2009 Amendment Cycle 1 DRCOG Conformity Determination Cycle 1 DRCOG Con… · multimodal surface...

2009 Amendment Cycle 1

DRCOG Conformity Determination (CO, PM10, and 1-hour Ozone)

for the

Amended Fiscally Constrained 2035 Regional Transportation Plan

and the

Amended 2008-2013 Transportation Improvement Program

Adopted August 19, 2009

Denver Regional Council of Governments 1290 Broadway, Suite 700

Denver, CO 80203

Preparation of this report has been financed in part through grants from the U.S. Department of Transportation, Federal Transit Administration,

and Federal Highway Administration

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ABSTRACT TITLE: 2009 Amendment Cycle 1 DRCOG Conformity Determination

(CO, PM10, and 1-hour Ozone) for the Amended Fiscally Constrained 2035 Regional Transportation Plan and the Amended 2008-2013 Transportation Improvement Program

AUTHOR: Denver Regional Council of Governments SUBJECT: Air quality conformity of the Denver region's long-range

transportation plan and short-range improvement program DATE: Adopted August 19, 2009 SOURCE OF COPIES: Public Information and Communications Office DRCOG 1290 Broadway, Suite 700 Denver, CO 80203 (303) 455-1000 NUMBER OF PAGES: 119 ABSTRACT: Demonstration of the Denver region's timely implementation of

adopted Transportation Control Measures and meeting of federally prescribed air pollution emissions tests.

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TABLE OF CONTENTS

1. INTRODUCTION ........................................................................................................ 1 Federal Requirements ...................................................................................................... 1 Current Situation ............................................................................................................... 4 Process ............................................................................................................................. 7

2. IMPLEMENTATION OF CONTROL MEASURES ................................................... 11 Transportation Control Measures .................................................................................... 11 Timely Implementation Criteria........................................................................................ 12

3. EMISSIONS TESTS ................................................................................................. 15

General Description ........................................................................................................ 15 Technical Process........................................................................................................... 18 Control Measures............................................................................................................ 26 Mobile Source Measures ................................................................................................ 28 Emission Test Results .................................................................................................... 29

APPENDIX A TRANSPORTATION NETWORK ASSUMPTIONS ........................... 33 APPENDIX B TRANSPORTATION MODEL CALIBRATION DESCRIPTION ......... 67 APPENDIX C PM10 STREET EMISSIONS REDUCTION COMMITMENTS ............. 83 APPENDIX D U.S. DEPARTMENT OF TRANSPORTATION CONFORMITY FINDING (TO BE PROVIDED) ............................... 117 APPENDIX E LIST OF ACRONYMS ..................................................................... 119

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LIST OF TABLES Table 1 Conformity Emissions Tests .................................................................................... 16

Table 2 Population and Employment Forecasts .................................................................... 18

Table 3 2035 Population and Employment Estimates by County .......................................... 19

Table 4 Proposed 2009 Cycle 1 Amendment to the 2035 RTP Roadway Projects ............... 23

Table 5 Proposed 2009 Cycle 1 Amendment to the 2035 RTP Transit Projects ................... 24

Table 6 2009 Cycle 1 Conformity Emissions Test Results .................................................... 31

LIST OF FIGURES Figure 1 Denver Transportation Management Area ............................................................... 2

Figure 2 Air Quality Attainment Maintenance Areas ............................................................. 17

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1. INTRODUCTION

Federal Requirements

The Denver Regional Council of Governments (DRCOG) is the Metropolitan Planning

Organization (MPO) for the Denver Transportation Management Area (TMA). Figure 1 displays

the TMA that now includes southwestern Weld County as approved by the Governor on

February 21, 2008. The MPO is required to show conformity of its fiscally constrained

transportation plan and Transportation Improvement Program (TIP) with the State

Implementation Plan (SIP) for air quality before these transportation plans and programs are

adopted. This action is required under Section 176(c) of the Clean Air Act, as amended in

1990. Conformity to an air quality implementation plan is defined in the Clean Air Act as

conformity to the implementation plan's purpose of eliminating or reducing the severity and

number of violations of the National Ambient Air Quality Standards (NAAQS) and achieving

expeditious attainment of such standards. In addition, activities may not cause or contribute to

new violations of air quality standards, exacerbate existing violations, or interfere with the timely

attainment of required emissions reductions towards attainment. For pollutants for which a

region currently meets standards but was formerly in nonattainment, the applicable SIP may

also be referred to as a maintenance plan, which demonstrates continued attainment of the

standards.

The U.S. Environmental Protection Agency (EPA) final transportation conformity rule is located

at 40 CFR Part 93. To address revised standards and changes in conformity requirements,

EPA has promulgated several amendments to the final rule in recent years. On July 1, 2004,

EPA issued amendments which addressed:

Conformity regulations for the new 8-hour ozone and fine particulate matter (PM2.5) NAAQS.

The incorporation of existing federal guidance that is consistent with a U.S. Court of Appeals

decision.

The streamlining and improving of EPA‟s existing transportation conformity rule1.

1 40 CFR Part 93

2

On March 10, 2006, EPA issued revisions addressing PM2.5 and PM10 Hot-Spot Analyses in

Project-Level Transportation Conformity Determinations. These project-level conformity

analyses are the responsibility of project sponsors. This conformity finding covers plan and

program level conformity only.

On January 9, 2008, the EPA administrator signed an amendment to the conformity rule, (the

“Final Rule”), to implement the provisions of SAFETEA-LU. The Final Rule was promulgated

February 25, 2008. No changes were made to the process used in developing this conformity

documentation, as none were applicable.

The EPA criteria and procedures vary according to the status of the State Air Quality

Implementation Plans for individual pollutants. Transportation plans and programs must satisfy

different criteria depending on whether the state has submitted a SIP revision, and whether the

EPA has approved such submittal.

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In addition to the emissions tests, the region must demonstrate timely implementation of

adopted Transportation Control Measures (TCMs). The transportation community is held

responsible for implementing TCMs to which the state committed in the various pollutant SIPs.

The U. S. Department of Transportation and EPA issued Interim Guidance for Implementing the

Transportation Conformity Provisions in the Safe, Accountable, Flexible, Efficient Transportation

Equity Act: A Legacy for Users (SAFETEA-LU) on February 14, 2006. The guidance was

issued to address changes in the Clean Air Act as amended by SAFETEA-LU. The document

addresses each of the revisions and explains how to implement the changes during the period

before federal conformity rules are revised. The majority of this guidance is superseded by the

Final Rule mentioned above, and EPA will update this guidance shortly.

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Current Situation

Transportation Planning The Metro Vision 2035 Plan is the long-range growth and development strategy for the Denver

region. It integrates plans for growth and development, transportation, and environmental quality

into a single comprehensive foundation for regional planning. Metro Vision calls for a balanced

multimodal surface transportation system, including rapid transit, a regional bus network, a

regional beltway, bicycle and pedestrian facilities, and improvements to the existing roadway

system.

The 2035 Metro Vision Regional Transportation Plan (MVRTP) is the transportation plan that

implements the transportation element of Metro Vision. The 2035 MVRTP contains an

unconstrained vision plan, outlining the region‟s transportation needs, as well as the fiscally

constrained plan, which includes those projects that can be implemented given the anticipated

level of funding. The 2035 MVRTP and Fiscally Constrained 2035 RTP were adopted on

December 19, 2007.

The Fiscally Constrained 2035 RTP was amended in January 2009 to reflect new locally and

regional/federally-funded roadway and transit projects. These amendments were submitted as

part of the integrated annual Metro Vision Assessment Process. Through this mechanism,

DRCOG ensures that its regional plans reflect the most current information about the existing

and future conditions of the region.

DRCOG‟s Fiscally Constrained 2035 RTP is being amended in this cycle to include proposed

roadway and transit network changes. The amendments are described in Chapter 3. Short-

range programming of transit, multimodal, and roadway improvements through the 2008-2013

TIP is reflected in this conformity finding documentation. The 2008-2013 TIP implements the

Fiscally Constrained 2035 RTP. The 2008-2013 TIP was originally adopted on March 19, 2008

and is amended quarterly.

Air Quality Planning The status of air quality planning is important as it determines the emissions tests that must be

met to find conformity.

The latest revision to the carbon monoxide (CO) maintenance plan for Longmont established the

emissions budget at 43 tons per day (tpd) for 2010 and beyond. On May 3, 2007, EPA found the

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revised CO budget of 43 tpd “adequate” for use in conformity determinations. EPA‟s approval

of this latest Longmont CO Maintenance Plan revision became effective on October 16, 2007.

The most recent revised CO maintenance plan for Denver, approved by the Colorado Air Quality

Control Commission (AQCC) on December 15, 2005, established the emissions budget at 1,625

tpd through 2020, and 1,600 tpd for 2021 and beyond. On May 3, 2007, EPA found the revised

CO budget of 1,600 tpd adequate for use in conformity determinations for 2021 and beyond.

EPA‟s approval of the revised Denver CO Maintenance Plans became effective on

October 16, 2007.

The State of Colorado submitted the latest Denver particulate matter less than 10 microns in

size (PM10) maintenance plan to the EPA in December 2005. EPA approved this latest PM10

SIP Revision on January 7, 2008. This latest PM10 Maintenance Plan revision contains the PM10

budgets of 54 tpd and 55 tpd for the years 2015 through 2021, and 2022 and beyond,

respectively, as well as the wintertime NOx budgets of 70 tpd and 56 tpd for the years 2015

through 2021, and 2022 and beyond, respectively.

The Regional Air Quality Council (RAQC), in cooperation with the state, prepared a maintenance

plan for the 1-hour ozone standard. The maintenance plan was submitted to the EPA in May

2001. Based on this submittal, effective October 11, 2001, the EPA approved the Denver 1-hour

ozone standard redesignation request, the maintenance plan, and the volatile organic compounds

(VOC) and summertime NOx transportation conformity budgets of 119 and 134 tpd, respectively,

for 2002 and beyond.

The EPA currently has two NAAQS for ozone, the 1-hour standard and the 8-hour standard. The

maintenance plan and associated documents for the 1-hour standard are described above. Based

on the 2001-2003 three-year average, the Denver region is in violation of the 8-hour standard. EPA

found Denver to be in nonattainment for the 8-hour ozone standard in April 2004. However, the

EPA deferred this designation until 2007 as DRCOG, RAQC, Colorado Department of Public Health

and Environment (CDPHE), AQCC, and Colorado Department of Transportation (CDOT) entered

into the Ozone Early Action Compact and subsequently developed and implemented an Early

Action Plan. The Denver region violated the standard during the 2007 summer ozone season for

the three-year 2005-2007 average, and on November 20, 2007, was formally designated in

nonattainment under the 8-hour ozone standard. The initial interim conformity determination under

the 8-hour standard for the Denver-North Front Range Region was approved by DRCOG and the

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NFRMPO in October, 2008 and by FHWA. The interim 8-hour conformity determination for 2009

Cycle 1 amendments is being prepared concurrently under separate cover.

PM2.5

On October 17, 2006, EPA published a final rule that lowered the 24-hour PM2.5 standard from the

1997 level of 65 micrograms per cubic meter (μg/m3) to 35 μg/m3, and retained the annual standard

of 15.0 μg/m3. A violation of the 24-hour standard occurs if the 3-year average of the 98th percentile

of all 24 hour readings exceeds 35 μg/m3. A violation of the annual standard occurs when the 3-

year average of the annual average exceeds 15.0 μg/m3. The Denver region is currently not in

danger of violating this standard.

Air Quality Situation The region has been redesignated attainment maintenance for CO, PM10, and ozone (1-hour

standard). The pollutants and their violation status for the Denver region include:

Carbon Monoxide – A violation of the carbon monoxide standard occurs when a monitoring

station shows more than one exceedance per year of the 8-hour (9 parts per million (ppm)) or

1-hour (35 ppm) standard. The carbon monoxide standard was last violated in 1995. In 2007,

the Department of Public Health and Environment measured a 1-hour reading of 6.0 ppm at

the Denver-CAMP monitoring station located at 2105 Broadway, which was approximately 17

percent of the federal health 1-hour standard of 35 ppm. The state health department also

measured an 8-hour level of 3.2 ppm at the Denver-CAMP station, which was approximately

36 percent of the federal, health-based 8-hour standard of 9 ppm.

PM2.5 – An exceedance of the PM2.5 standard occurs when a monitoring station exceeds the

annual average of 15 μg/m3 or the 24-hour average of 35 μg/m3. A violation of the 24-hour

standard occurs only if the 3-year average of the 98th percentile of all 24 hour readings at a

monitor exceeds 35 μg/m3.or the 3-year average of the annual averages exceeds 15 μg/m3.

However, a violation has not occurred because the three-year 98th percentile average through

2007 at the Commerce City station, located at 7101 Birch Street, was approximately 26 μg/m3

which is 75 percent of the 24 hour standard. The state health department recorded a 3-year

average annual reading of approximately 10.0 µg/m3 through 2007 at the Commerce City

station, which is 67 percent of the federal annual average standard.

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PM10 – An exceedance of the PM10 standard occurs when a monitoring station exceeds a

24-hour average of 150 µg/m3. If the 24-hour standard is exceeded more than three times over

a three-year period, it is a violation. The PM10 standard was last violated on three days in 1993.

The highest reading in 2007 was 118 µg/m3 recorded at 7101 Birch Street, Commerce City

station, which is approximately 79 percent of the federal standard of 150 µg/m3 averaged over

24 hours.

1-Hour Ozone – As noted in the 1-hour Ozone Attainment SIP, the standard is attained when the

expected number of days per calendar year with maximum hourly average concentrations above

0.12 ppm is equal to or less than one. In practice, the fourth exceedance of 0.125 ppm at the

same monitor in a three-year period results in a violation. The 1-hour ozone standard was last

violated in 1988. The highest recent reading was 0.108 ppm in 2007 at the Rocky Flats Station,

which was approximately 90 percent of the federal 1-hour standard of 0.12 ppm.

8-Hour Ozone – A violation of the 8-hour ozone standard occurs when the three-year average of

the annual fourth-highest daily maximum 8-hour ozone concentration at one monitor exceeds the

federal standard of .08 ppm. Due to rounding, a three-year average of the fourth maximum value

of 0.085 ppm or greater would constitute a violation. In the 2007 ozone season (June, July, and

August), the Denver region violated the 8-hour ozone standard, as the 2005-2007 three-year

average of the fourth maximum value at the Rocky Flats monitor was 0.085 ppm. The 2007

summer ozone season saw 20 values of 0.085 ppm and higher scattered throughout the 13

monitors in the 8-hour ozone control area. Based on this violation, on November 20, 2007, EPA

officially designated the Denver region to be in nonattainment of the 8-hour ozone standard.

However, because the proposed 8-hour ozone budgets have not yet been approved by EPA,

conformity to the 1-hour standard still applies for this conformity determination.

Process

Agency Roles The Conformity SIP was developed by the AQCC and adopted in 1998. It formally defines the

process for finding conformity. In November / December 1998, a memorandum of agreement

was signed by the Colorado Department of Public Health and Environment and DRCOG for the

purpose of defining the specific roles and responsibilities in conformity evaluations and findings.

The EPA approved the Conformity SIP on September 21, 2001 (66FR48561). This makes the

Conformity SIP federally enforceable.

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DRCOG, as the MPO, and the Federal Transit Administration (FTA) and Federal Highway

Administration (FHWA), as representatives of the U.S. Department of Transportation, are

charged with determining conformity for the Denver TMA. The process of developing the

Fiscally Constrained RTP and TIP conformity determination has been a cooperative one

between the RAQC, the Colorado Department of Public Health and Environment's APCD, the

EPA, the FHWA, the FTA, the CDOT, the Regional Transportation District (RTD), and DRCOG.

2009 Amendment Cycle 1

In January 2009, DRCOG solicited its member governments as well as RTD and CDOT for

2009 Cycle 1 amendments to the 2035 Regional Transportation Plan. During the development

of the conformity finding, federal regulations require the MPO to consult with the state and

regional air quality agencies, local transportation agencies, CDOT, RTD and EPA. DRCOG

used the Metropolitan Planning Organization’s Agency Coordination Team (ACT) as the primary

group for interagency consultation. Upon receipt of the amendment requests in March 2009,

the amendments were vetted through internal DRCOG staff, and, subsequently discussed and

reviewed by the ACT, Transportation Advisory Committee, and Regional Transportation

Committee. The ACT reviewed the definition of conformity tests that must be met and the key

demographic and network definition assumptions. CDOT reviewed the highway networks. RTD

assisted in defining the transit networks. A list of the proposed 2009 Cycle 1 amendments can

be found in Chapter 3 - “Emission Tests.”

Public Participation

Public participation was encouraged throughout the development of the 2035 MVRTP, including

the Fiscally Constrained 2035 RTP, the 2008-2013 TIP and this conformity finding. Public

hearings (and associated 30-day comment periods) were held before the DRCOG Board for the:

• 2035 Metro Vision Regional Transportation Plan and its original conformity document on

December 5, 2007.

• 2008-2013 TIP on February 20, 2008.

• 2035 MVRTP 2008 Cycle 1 amendments and conformity document on July 16, 2008.

• 2035 MVRTP 2008 Cycle 2 amendments and conformity document on December 17,

2008.

• 2035 MVRTP 2009 Cycle 1 amendments and this conformity document on July 15, 2009.

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Summaries of testimony received at public hearings are available at the DRCOG office.

Members of the public are also encouraged to provide input to their local elected officials and

government staff who work closely with DRCOG staff on these processes.

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2. IMPLEMENTATION OF CONTROL MEASURES

Transportation Control Measures

The transportation plan and program must provide for the timely implementation of adopted

Transportation Control Measures (TCM) from the applicable implementation plan. The state air

quality implementation plan identified a number of TCMs that were funded and completed in

past TIPs. The implementation of rail transit was a substantial TCM, first defined in the 1979

Carbon Monoxide SIP and the 1982 Ozone SIP.

The region‟s first segment of light rail, which opened in October 1994, provides service from the

downtown area south to Broadway and I-25. The first extension of this service, the southwest

corridor, from Broadway and I-25 to Mineral Avenue along Santa Fe Boulevard, opened in July

2000.

An extension of light rail service into the Platte Valley opened in April 2002. Funding came from

a private-public partnership that included DRCOG, RTD, Denver and the private sector.

The southeast corridor light rail transit was completed in November 2006. It was the last

remaining partially completed TCM. It includes light rail service along I-25 from Broadway

south to Lincoln Avenue, as well as a light rail spur along I-225 from I-25 to Parker Road. With

the completion of the southeast corridor, the region has 35 miles of light rail transit serving

suburban and urban commuters.

RTD has expanded its fixed-route bus fleet from 628 in 1969 to 1,039 as of January 2009. This

fleet expansion and related increase in service has provided some emissions reduction to offset

the delay of the light rail transit control measure.

Beyond the SIP measures, the Fiscally Constrained 2035 RTP and 2008-2013 TIP continue

funding for transportation demand management (TDM) actions through:

The regional RideArrangers commuter services program.

A separate TDM grant program that supports subregional efforts, including programs

proposed by the corridor and subarea transportation management organizations (TMO).

The 2008-2013 TIP also continues congestion mitigation/air quality funding (CMAQ) funding to

assist in implementation of the FasTracks program, for local bus service initiatives, for

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bike/pedestrian projects at/near future FasTracks stations, and for Boulder County‟s Ethanol

Fuel Implementation Program.

The 2008-2013 TIP includes funding for three specific air quality agency projects:

Ozone Modeling and Analysis (CDPHE and RAQC)

Ozone Aware Program (RAQC)

New Energy Fleets Collaborative (Diesel Retrofit) (RAQC)

Five new CMAQ air quality improvement projects are included in the 2008-2013 TIP. They are:

Florida Light Rail Station Area Master Plan

38th/Blake Station Operation Study: Next Phase S. Westminster Transit Station Area Concept Plan: 71st/Lowell

Swansea Station Area Master Plan

Welton/Downing Corridor Station Master Plan

A pool for additional station area plans was also established with CMAQ funds.

The TIP also includes continuation of funding for 20 bike/ped projects and 8 roadway

operational projects indicated in previous TIPs with enhancement and STP-Metro funds and

adds 11 bike/ped and 7 roadway operations projects newly selected.

Timely Implementation Criteria

The transportation plan must meet two conditions to demonstrate timely implementation of TCMs:

The transportation plan, in describing the envisioned future transportation system, provides

for the timely completion or implementation of all TCMs in the applicable implementation

plan which are eligible for funding under Title 23 USC or the Federal Transit Act, consistent

with the schedule included in the applicable implementation plan.

The Fiscally Constrained 2035 RTP identifies the metropolitan transportation system of travel

demand actions, operational improvements, and capital-intensive roadway, high-occupancy

vehicle, and transit facilities, and contains policies to guide the implementation of the plan.

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There are no remaining TCM‟s to be implemented. The Denver Regional Element of the State

Air Quality Implementation Plan and the Fiscally Constrained RTP are consistent documents.

Nothing in the transportation plan interferes with the implementation of any TCM in the

applicable implementation plan.

The DRCOG committees and Board review the goals, policies, recommendations, and

improvements identified in the Fiscally Constrained RTP. No conflicts exist with any specific

requirements in commitments of the adopted SIP. The Fiscally Constrained RTP does not

prohibit implementation of any SIP TCM, nor does it make it impossible to implement any

SIP TCM.

TCMs contained in the SIP, but not directly related to the Fiscally Constrained RTP, given

their non-facility planning nature, include the federal Motor Vehicle Emissions Control

Program, Inspection and Maintenance Program, stationary source controls, display signs

instructing motorists to turn off engines, warranty enforcement, and gasoline high altitude

emissions research. The Fiscally Constrained 2035 RTP contains no policies that inhibit the

implementation of these measures.

For a TIP to provide for the timely implementation of TCMs, three criteria must be satisfied:

TCMs, which are eligible for funding under Title 23 USC of the Federal Transit Act, are on or

ahead of the schedule established in the applicable implementation plan, or, if such TCMs are

behind schedule, the MPO and DOT have determined the past obstacles to implementation

have been identified and overcome.

An examination of the projects listed in the 2008-2013 TIP shows that adequate funding is

provided for all ongoing control measures and programs related to TCMs, including:

Continued expansion of the bus fleet.

Transportation demand management activities.

PM10 reduction measures (diesel retrofit)

The regional RideArrangers program.

The regional traffic signalization program.

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If TCMs have previously been programmed, but funds have not been obligated and the

TCMs are behind schedule, then the TIP cannot be found to conform if the funds intended

for these TCMs are reallocated to projects in the TIP other than TCMs.

This situation has not occurred. Programmed funds for TCMs have been obligated.

Nothing in the TIP may interfere with implementation of any TCM in the applicable

implementation plan.

The DRCOG committees and Board review the projects identified in the 2008-2013 TIP.

No conflicts exist with any specific requirements or commitments of the adopted SIP. The

TIP does not prohibit implementation of any SIP TCM, nor does it make it impossible to

implement any SIP TCM.

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3. EMISSIONS TESTS

General Description

The transportation plan and program must pass a series of emissions tests to demonstrate

conformity. These emissions tests relate to the pollutants and their precursors for which the

Denver region is designated as attainment-maintenance of the NAAQS.

These pollutants and precursors include:

Carbon monoxide (CO)

Volatile organic compounds (VOCs) as a precursor for ozone

Nitrogen oxides (NOx) as a precursor for ozone (summertime estimate)

PM10

Nitrogen oxides (NOx) as a precursor for PM10 (wintertime estimate)

Each pollutant and precursor in specific geographic areas must pass a number of tests. The plan

and program must respect the motor vehicle emissions budget in the applicable SIP or SIP

submittal. Satisfying these tests generally involves demonstrating that relevant emissions in future

years are less than or equal to the emissions budget found in the applicable maintenance plan.

As required by 40 CFR 93.118, consistency with the motor vehicle emissions budget(s) must be

demonstrated for each year for which the applicable implementation plan specifically establishes

motor vehicle emissions budget(s), for the attainment year (if it is within the timeframe of the

transportation plan), for the last year of the transportation plan‟s forecast period, and for any

intermediate years as necessary so that the years for which consistency is demonstrated by

analysis are no more than ten years apart.

In addition, when a maintenance plan has been submitted, emissions must be less than or equal

to the motor vehicle emissions budget(s) established for the last year of the maintenance plan

and any year for which the maintenance plan establishes budgets.

Applying these tests for the prescribed time periods for each of the pollutants results in 34

emissions tests as listed in Table 1.2 The analysis areas are shown in Figure 2.

2 Transportation model runs represent the beginning of a calendar year. Test dates listed in Table 1 refer

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Table 1 Conformity Emissions Tests

Pollutant and Area Tests

Carbon Monoxide in Denver Attainment Maintenance Area

3

2013 staging ≤ Budget of 1,625 tpd4

2015 staging ≤ Budget of 1,625 tpd


2021 staging ≤ Budget of 1,600 tpd4, 5


Fiscally Constrained 2035 RTP ≤ Budget of 1600 tpd

Carbon Monoxide in Longmont Attainment Maintenance Area

3

2010 staging ≤ Budget of 43 tpd4

2015 staging ≤ Budget of 43 tpd




PM10



2022 staging ≤ Budget of 55 tpd4,5



NOx associated with PM10




2022 staging ≤ Budget of 56 tpd4, 5



VOC in 1-Hour Ozone Attainment Maintenance Area

7







NOx in 1-Hour Ozone Attainment Maintenance Area

7







to model run dates. 3 EPA approval is effective October 16, 2007. 4 This is the year the budget was established in the maintenance plan. 5 EPA adequacy finding effective June 28, 2007. 6 EPA approval of PM10 Maintenance Plan, effective January 7, 2008. 7 Conformity still based on 1-hour standard. 8 This is the last year of the 1-hour ozone maintenance plan.

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Technical Process

The technical process used to estimate future pollutant emission levels is based on the latest

planning assumptions in effect at the time of this conformity determination. Assumptions behind

the analysis were derived from estimates of current and future population, employment, travel,

and congestion most recently developed by DRCOG. Information concerning travel and

congestion estimates was updated as part of this conformity finding process. The above-

mentioned factors were used with the latest EPA emission model (MOBILE 6.2) to estimate

emissions.

Demographic Assumptions The population forecast for the full DRCOG region in 2035 is 4,341,600. This is an increase of 61

percent over the year 2005 estimated population of 2,697,300. Employment is forecast to be

2,566,000 in 2035 compared to the year 2005 estimate of 1,568,200, an increase of 64 percent.

Growth in population and employment will be the principal factor for the increased demand for travel

on the region‟s transportation facilities and services. Table 2 shows the latest forecasts of

population and employment for 2005, 2015, 2020, 2030, and 2035 for the DRCOG area. Table 3

lists 2035 population and employment estimates by each of the nine counties, as well as the small

portion of Weld County that is within the DRCOG region.

Table 2 Population and Employment Forecasts

DRCOG Region 2005 2015 2020 2030 2035

Population 2,697,300 3,133,900 3,420,400 4,024,200 4,341,600

Employment 1,568,200 1,974,950 2,126,900 2,422,400 2,566,000

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Table 3 2035 Population and Employment Estimates by County

County Population Employment

2005 2035 2005 2035

Adams 409,200 773,500 175,700 431,800

Arapahoe 531,700 890,200 318,800 473,500

Boulder 294,000 386,600 177,600 213,200

Broomfield 46,500 107,400 35,000 102,700

Clear Creek 9,700 16,900 3,400 5,600

Denver 579,500 760,900 487,600 706,200

Douglas 246,900 554,400 103,400 225,000

Gilpin 5,100 14,900 5,400 8,100

Jefferson 536,700 695,100 254,100 357,000

Weld County portion 38,000 141,600 7,200 43,000

TOTAL DRCOG Region

2,697,300 4,341,600 1,568,200 2,566,000

Transportation Assumptions In order to complete the emissions tests, the 2015, 2020, 2030, and 2035 transportation networks

must first be defined. DRCOG‟s Fiscally Constrained 2035 RTP specifies financially constrained

highway and transit transportation system improvements and resulting networks to be completed

by the year 2035. The detailed list of improvement projects by completion year is displayed in

Appendix A. The most significant highway and transit projects are listed below.

The 2008-2013 TIP advances a number of regionally significant projects that are contained in the

Fiscally Constrained 2035 RTP. They include:

Federal Boulevard from Alameda to 6th Avenue: widen roadway to six lanes.

US-85 from Titan Road to Castle Rock: widen roadway to four lanes.

US-285 from Foxton to Jefferson County line: widen roadway to four lanes, improve

intersections.

Arapahoe Road at Parker Road: new grade-separated interchange.

I-70/SH-58 and Ward Road (south ramps) Interchanges: construct new ramps.

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West Corridor, Central Corridor to Jefferson County Center: new light rail, stations, park-n-

Rides.

Gold Line, Denver Union Station to Ward Road: new light rail, stations, park-n-Rides.

I-225 Corridor, Parker Road to Smith Road: new light rail, stations, parking.

North Metro Corridor, Denver Union Station to 160th Avenue: new rail, stations, parking.

Southeast Corridor: rail, stations, parking.

Southeast Corridor, Lincoln Avenue to RidgeGate Parkway Extension: extend light rail with

stations, park-n-Ride.

Southwest Corridor, Mineral Station to C-470 Extension: extend light rail, new park-n-Ride.

Northwest Rail, Denver Union Station to Longmont: new rail, stations, parking.

US-36 BRT, Denver Union Station to Table Mesa: new slip ramps, access improvements,

park-n-Rides.

Central Corridor; 30th & Downing to 40th & 40th Extension: new light rail and stations.

East Corridor, Denver Union Station to Denver International Airport: new rail, stations, and

park-n-Rides.

Denver Union Station: intermodal center.

I-225, Parker Road to I-70: widen roadway to six lanes.

US-36, 120th Avenue Connection: build new six lane road.

56th Avenue from Quebec to Havana: widen roadway to six lanes.

I-25/Ridgegate: new interchange.

SH-83 from Bayou Gulch Road to Hilltop Road: widen roadway to six lanes.

I-25 from Santa Fe to Alameda: interchange improvements.

I-225 from 2nd Avenue to Mississippi Avenue: widen from four to six lanes.

I-25 from SH-52 to SH-66: widen roadway to six lanes.

Regional highway projects in the Fiscally Constrained 2035 RTP using federal and state

resources, in addition to those listed above, include:

SH-121/Wadsworth Boulevard from 36th Avenue to 46th Avenue: widen roadway to six

lanes.

21

SH-121/Wadsworth Parkway from 92nd Avenue to SH-128/120th Avenue: widen roadway to

six lanes.

104th Avenue from Colorado Boulevard to US-85: widen roadway to four lanes.

I-25 South from Douglas Lane to Meadows Parkway: widen roadway to six lanes.

I-25 South from Meadows Parkway to C-470: widen roadway to eight lanes.

I-70 Viaduct (East Corridor): Brighton Boulevard to York Street: roadway reconstruction and

interchanges.

I-70 East from I-270 to Havana Street: widen to eight lanes.

SH-7 Arapahoe Road from Cherryvale Road to VoTech Drive: widen roadway to four lanes.

US-285 Hampden Avenue from Colorado to I-25: widen roadway to six lanes.

SH-30 Hampden Avenue from Dayton to Havana: widen roadway to six lanes.

I-25 from US-36 to Thornton Parkway: widen to eight lanes.

I-270 from Vasquez to Quebec Street: widen to six lanes.

US-36 at Wadsworth Boulevard: interchange reconstruction.

Regional highway projects in the Fiscally Constrained RTP using locally-derived funds include:

New interchange at I-25/North Meadows Drive in Castle Rock, Douglas County.

E-470 from I-25 to I-25: widen to eight/six lanes; build five new interchanges.

New interchange at C-470/Alameda.

New I-70 interchanges at Central Park Boulevard and Harvest Mile Road.

Peña Boulevard from I-70 to DIA: widen to six lanes.

Proposed 2009 Cycle 1 project amendments to the Fiscally Constrained 2035 RTP roadway

network are described in Table 4. The amendments are on US-36 (Boulder Turnpike) and Martin

Luther King Boulevard.

The 2010 rail rapid transit network includes the existing Central, Southwest, and Central Platte

Valley rail lines, and the Southeast light rail line which opened in 2006. It also includes the I-25

HOV/Tolled Express Lanes, which also opened in 2006, as well as the existing

Broadway/Lincoln bus lanes and the existing Santa Fe high occupancy vehicle lanes. The

2015 rail rapid transit network includes all of the rapid transit corridor lines that were approved

22

by voters in RTD‟s FasTracks plan on November 2, 2004. There are no specific differences in

the rail rapid transit network between the 2015, 2020, 2030 and 2035 staging years. The

differences are in the demographic and employment information that constitute the inputs to

the travel demand model and subsequent ridership values.

Proposed 2009 Cycle 1 project amendments to the Fiscally Constrained 2035 RTP transit network

are described in Table 5. All of the amendments are associated with transit station location and

parking changes.

23

Table 4 Proposed 2009 Cycle 1 Amendment to the 2035 RTP Roadway Projects

Sponsor Project Location Current FC-2035-RTP Project Description

Type of Change to FC-2035-RTP

Funding Source (cost change)

2009 Existing Lanes

Proposed 2035 Lanes

Staging Year(s)

CDOT US-36: 96th St to Interlocken East

Add through lanes Remove project from plan

regional (-$47 million)

4 4 n/a

Colorado Tolling Enterprise (CTE)

US-36 BRT/HOV: Foothills Pkwy to I-25

Construct HOV/BRT lanes

Change project from HOV to HOT managed lanes

regional (+$47 million)

0 2 2025-30

Denver Martin Luther King Blvd: Central Pk Blvd to Havana

Not on currently designated regional system

Add to the regional roadway system as a principal arterial

n/a 4 4 n/a

Denver Martin Luther King Blvd: Havana to Peoria St

Not in the FC-2035-RTP

Add project to regional system and construct new 4-lane roadway: Havana to Peoria

local/private ($14.5 million)

0 4 2015

24

Table 5 Proposed 2009 Cycle 1 Amendment to the 2035 RTP Transit Projects

Sponsor Project Location Current FC-2035-RTP Project Description

Type of Change to the FC-2035-RTP

Funding Source (cost change)

2009 Existing Spaces

Proposed 2035 Spaces

Spaces at Opening

RTD FasTracks Central and East Corridors: park-n-Ride/Station at 38th

Station at 40th St/40th Ave (400 parking spaces)

Change location from 40th/40th to 38th/Blake (add 100 parking spaces)

local/RTD 0 500 200

RTD

FasTracks East Corridor: park-n-Ride/Station at Central Park Blvd

Station at Stapleton (1,769 parking spaces)

Name change from Stapleton to Central Park Blvd (reduce by 269 parking spaces)

local/RTD 1,769 (Stapleton)

1,500 1500

RTD

FasTracks East Corridor: park-n-Ride/Station at Colorado Blvd

Station at Colorado Blvd (1,700 parking spaces)

Add 100 more parking spaces

local/RTD 0 1,800 200

RTD

FasTracks I-225 Corridor: park-n-Ride/Station at 13th Ave

Not in the FC-2035-RTP

Add new station at 13th Ave with 690 parking spaces

local/RTD 0 690 250

RTD

FasTracks I-225 Corridor : park-n-Ride/Station at Fitzsimmons South (Colfax)

Station at Fitzsimmons South (600 parking spaces)

Name change to Colfax station (no parking spaces)

local/RTD 0 0 0

RTD I-225: park-n-Ride/Station at Iliff

Station at Iliff Add 460 more parking spaces

local/RTD 0 910 600

RTD I-225: park-n-Ride/Station at Florida

Station at Exposition Change location from Exposition to Florida

local/RTD 0 0 0

RTD I-225: park-n-Ride/Station at 2nd Ave/Abilene

Station at 4th Avenue Change location from 4th Ave to 2nd Ave/Abilene (add 200 parking spaces)

local/RTD 0 200 200

25

The regional travel model was used to perform the travel forecasting. A summary description

of the model is included in Appendix B. A more detailed description is documented in the

DRCOG Compass Transportation Model Documentation and in a metadata report. Additional

documentation is available on the assumptions and operation of the socio-economic model.

These reports and papers are available for inspection at the DRCOG offices. This model

includes a number of assumptions, which are supported by current regional experience.

One set of modeling assumptions concerns transit operating policies. The model assumes that

RTD will keep transit fares constant in current dollars. This is a logical assumption as RTD has

an adopted policy of increasing fares in line with increases in the Consumer Price Index.

Modeled fares for proposed new services are based on the most similar existing services. The

model assumes that RTD would continue with its current approach in setting service levels for

various areas of the region. RTD last increased its fares in January 2009.

The model assumes that the Northwest Parkway Authority and the E-470 Authority will

continue to charge tolls on their facilities on a per-mile cost basis in constant dollars similar to

current charges (16 cents per mile in 1996 dollars).

Parking costs in downtown Denver were varied using the Denver parking cost model, which

uses employment density and estimates of parking supply as variables. Parking costs were

established outside the Denver Central Business District by surveying current parking costs for

work and non-work trips, and assuming that these would remain constant over time.

Air Quality Modeling Assumptions The APCD of the Colorado Department of Public Health and Environment generated the Mobile

6.2 air pollution estimates. The conformity analysis for the 2009 Cycle 1 conformity finding began

in March 2009 after identification by RTD, CDOT, and local governments of projects they would

be submitting for inclusion. The models and assumptions used by APCD in the 2035 conformity

analysis were consistent with the SIP modeling and analysis that led to development of the

Denver and Longmont SIPs for carbon monoxide. The technical support documentation for each

of these SIPs is available for information at http://apcd.state.co.us/tech.aspx.

26

Control Measures

There are several actions or projects described or assumed in the SIPs that are federally

enforceable control measures. PM10 street maintenance actions are one such control measure.

PM10 Street Maintenance Actions DRCOG must demonstrate that future year estimates of PM10 emissions will be less than or

equal to the maintenance PM10 emissions budgets to show conformity with the PM10 SIP. The

mobile source PM10 budgets are 54 tons per day (tpd) through 2021, and 55 tpd for 2022 and

beyond.

AQCC Regulation 16 is essential to the control of mobile source emissions. Adopted on August 15,

1991, the regulation has undergone several revisions, with the latest occurring on April 19, 2001.

Re-entrained road dust in the Denver metropolitan area from winter street sanding causes between

40 and 60 percent of PM10 emissions. It is the single largest contributor to PM10 emissions9.

Regulation 16 targets street sanding and sweeping practices.

Since October 1, 1991, street sanding material providers have been required to meet set

standards for the sanding materials they provide to state, city and county governments. The

regulation applies to both new and recycled sanding materials. All materials must meet

requirements regulating their angularity, percent fines and degree of durability. The burden of

material testing to meet these standards falls on the private companies supplying the materials.

An independent laboratory must conduct all testing.

Reductions in the applied amount of sanding material are also set for all of the local governments

and street maintaining agencies (CDOT, RTD, E-470 Authority, Northwest Parkway Authority)

within the nonattainment area. A reduction of 30 percent from their established baseline amount is

mandated. Baseline amounts are typically based on 1989 practices. In the defined “foothills” area,

9 In June 1998, the Colorado Department of Transportation, with technical assistance of Midwest Research Institute,

concluded a study of the role of sand in PM10 emissions. Findings from this study demonstrated that the percentage of the total PM10 emissions from road traffic that consist of road dust increases from about 50 percent to as much as 80 or 90 percent during the high impact 24-hour period following road sanding. Previously, the PM10 emissions analysis had been using a sand share of 33.8 percent or about half of the recent study findings. Increasing the role of sand in producing PM10 emission increases the benefits of reduced street sanding. Over the past few years, local governments, CDOT, RTD and the E-470 Public Highway Authority have made major strides to reduce PM10 emissions from street sand by reducing the amount of sand spread on the streets during snow storms by about 40 percent from 1989 street sanding levels and increasing the sweeping of sanded streets within four days of each snow storm from none to 40 percent.

27

a 20 percent reduction from the established baseline is mandated. In addition to the above

requirements, the City and County of Denver and CDOT are required to reduce PM10 emissions

by:

72 percent within the Denver central business district.

50 percent within an area bounded by Federal Boulevard, Downing Street, 38th Avenue, and

Louisiana Avenue.

Records and reports of the reductions and practices used must be submitted yearly to the APCD

and the RAQC.

Finally, Regulation 16 sets rules for street sweeping to achieve reductions in PM10 emissions.

These rules include time requirements for sweeping after deployments of street sanding

materials, definition of the sweeping techniques to be used and targeted areas for increased

sweeping. Record keeping and reporting of dates, equipment use and areas swept are required

under these rules.

Preliminary Cycle 2 estimates of 2035 emissions indicated that PM10 emissions would be about

66.3 tpd after accounting for the impacts of Regulation 16. This is 11.3 tpd more than the 55 tpd

emissions budget. Because of this anticipated exceedance of the PM10 emissions budget, local

governments and road agencies were asked to provide commitments to further reduce emissions.

These commitments are for additional reductions in sand application and an increase in street

sweeping activities, above and beyond Regulation 16, to further reduce mobile source PM10

emissions. Thirty one local governments and agencies have committed to additional street

sanding and sweeping measures beyond Regulation 16. Actions that can be employed to

achieve PM10 reductions include:

Reducing the total amount of sanding materials used.

Using anti-icers, deicers, and other sand substitutes in place of sanding materials.

Street sweeping within four days of each snow event.

The local governments and agencies decide on the combination of the above actions they will

employ to meet their commitments.

28

The street sanding and sweeping commitments made by local governments, CDOT, and E-470

are detailed in Appendix C. The mobile source PM10 emissions analysis shows emission levels

of 42.53 tpd in 2035. This is less than the mobile source PM10 emission budget of 55 tpd.

The Fiscally Constrained 2035 RTP reserves approximately $90 million over a 28-year period in

CMAQ and local match funds for air quality programs and purchases. Some of this $90 million

will fund additional sweeper and deicer equipment.

The PM10 maintenance plan also identifies a test whereby the region must demonstrate that

transportation construction emissions do not exceed those assumed in the emissions budgets.

The budgets were established on the assumption that all of the facilities in the Fiscally

Constrained 2020 RTP, the RTP in effect at the time the PM10 SIP was adopted, would be

constructed at rates of 11.4 lane-miles per year for freeways and 62.7 lane-miles per year for

major regional and principal arterials. To pass the test, the rate of lane-mile construction

proposed in the Fiscally Constrained 2035 RTP must be less than or equal to the rate of

construction in the Fiscally Constrained 2020 RTP. The rate of construction for the Fiscally

Constrained 2035 RTP is 5.4 lane-miles per year for freeways and 42.5 lane-miles per year for

major regional arterials and principal arterials. Thus, the construction emissions of the Fiscally

Constrained 2035 RTP are less than the construction emissions assumed in the budgets and

the test is passed.

Mobile Source Measures

The regional emissions analysis does not reflect the air quality benefits of such travel demand

management programs as DRCOG‟s RideArrangers Program, Teleworking, EcoPass, and other

transportation demand management actions. In addition, other programs whose benefits are

more difficult to ascertain are not fully incorporated into the model. Examples of such programs

include compressed workweeks and programs initiated after 1998.

The model does include emissions reduction benefits created by the regional Traffic Signal

System Improvement Program (TSSIP), which is a program in the TIP. The goal of this

program is to ensure that the region‟s traffic signals operate in a safe manner that makes the

most efficient use of arterial street capacity. The efficiency objectives include:

Minimizing vehicle stops.

Minimizing travel delay.

29

Minimizing disruption caused by malfunctioning equipment.

The major components of the TSSIP include:

A capital improvement program that provides intersection control equipment and installs

communications links to allow signals to operate as a system.

A program to retime signals in a coordinated fashion to improve corridor travel time through

accomplishment of the above objectives.

In 2002, speed-and-delay runs were conducted on corridors in the region. The speeds in the

model were then adjusted to match the speeds that were observed in the speed-and-delay runs.

Consequently, the TSSIP, and its benefits to air quality, is reflected in the model.

Emission Test Results

The results of the emissions tests are reported in Table 6. The emissions estimates were

generated by APCD using the latest demographic forecasts, transportation inputs, and

emissions models. The test results do not indicate any failures in the horizon years of the

program or plan that would lead to a finding of non-conformity.

A qualitative test is required for years prior to 2013 in Denver for carbon monoxide. The

regional emissions analysis was completed for 2005 and is 1,517 tpd, which is less than the CO

SIP estimate of 1,614 tpd in 2006. The 2015 carbon monoxide estimate is 1,213.7 tpd, which is

below the budget. The carbon monoxide emissions for years prior to 2013 should then be equal

to or lower than the 1,600 tpd that applies to later years. No other factors (such as stationary

sources) are expected to cause a violation.

Qualitative assessments for years prior to 2015 are required for PM10. The region should not

violate the federal air quality standard as the region is currently at about 67 percent of the

federal health standard, and the 2015 estimate for direct PM10 is 32.8 tpd and 50.2 tpd for NOx

associated with PM10. Because both of these estimates are below the 54 tpd direct PM10 and

70 tpd NOx budgets, no violation is expected in years prior to 2015. Interpolation is not needed

under federal regulations as quantitative analyses were completed for 2015.

The Denver region was below all of the standards listed in Table 1. As noted above, the Denver

region is still demonstrating conformity with the 1-hour ozone standard. On November 20, 2007, the

30

Denver region was designated as nonattainment for the 8-hour ozone standard. Because of this

nonattainment designation, the region will have to prepare an ozone 8-hour attainment SIP.

Conformity to the 1-hour ozone standard will continue to apply as one of the “interim” ozone tests

until 8-hour ozone emissions budgets are found adequate by the EPA. After that, the region would

have to demonstrate conformity to the 8-hour budgets and will cease examination of emissions

compared to the 1-hour budgets.

31

Table 6 2009 Cycle 1 Conformity Emissions Test Results

10 2013 derived from interpolation of 2010 estimate of 1,411.3 tpd and 2015 estimate of 1,213.7 tpd. 11 2021 derived from interpolation of 2020 estimate of 1,113.7 tpd and 2025 estimate of 1,151.9 tpd. 12 2022 derived from interpolation of 2020 estimate of 35.46 tpd and 2030 estimate of 37.62 tpd. 13 2022 derived from interpolation of 2020 estimate of 39.1 tpd and 2030 estimate of 31.9 tpd. 14 2006 derived from interpolation of 2005 estimate of 92.4 tpd and 2010 estimate of 66.6 tpd. 15 2013 derived from interpolation of 2010 estimate of 66.6 tpd and 2015 estimate of 52.7 tpd. 16 2006 derived from interpolation of 2005 estimate of 127.9 tpd and 2010 estimate of 79.9 tpd. 17 2013 derived from interpolation of 2010 estimate of 79.9 tpd and 2015 estimate of 50.8 tpd.

Pollutant and Area Test Result<Budget (tons per day)

Pass/Fail

Carbon Monoxide in Denver Attainment Maintenance

Area

2013 Staging ≤ Budget10

2015 Staging ≤ Budget




Fiscally Constrained 2035 RTP ≤ Budget

1,292.7 < 1,625

1,213.7 < 1,625

1,113.7 < 1,625

1,121.3 < 1,600

1,286.1 < 1,600

1,389.4 < 1,600

Pass

Pass

Pass

Pass

Pass

Pass

Carbon Monoxide in Longmont Attainment

Maintenance Area






36.6 < 43

32.2 < 43

29.9 < 43

33.9 < 43

41.1 < 43

Pass

Pass

Pass

Pass

Pass

PM10






32.8 < 54

35.5 < 54

35.9 < 55

37.6 < 55

42.5 < 55

Pass

Pass

Pass

Pass

Pass

NOx associated with PM10






50.2 < 70

39.1 < 70

37.7 < 56

31.9 < 56

32.5 < 56

Pass

Pass

Pass

Pass

Pass

Ozone VOC in 1-Hour Ozone Attainment Maintenance Area







87.2 < 119

58.3 < 119

52.7 < 119

44.8 < 119

41.6 < 119

42.7 < 119

Pass

Pass

Pass

Pass

Pass

Pass

NOx in 1-Hour Ozone Attainment Maintenance Area







118.3 < 134

62.4 < 134

50.8 < 134

39.5 < 134

33.5 < 134

27.4 < 134

Pass

Pass

Pass

Pass

Pass

Pass

32


33

APPENDIX A TRANSPORTATION NETWORK ASSUMPTIONS

34


TIP-IDCOG-ID Before AfterImprovement ClassificationFacility Name Start At End At

Through Lanes

Staging: 2010 Fiscally Constrained

Model Network Change Included in the 2009 Cycle 1 Air Quality Conformity Assessment for the Fiscally Constrained 2035 RTP and the 2008-2013 TIP

By 2035 RTP Staging PeriodsMay 28, 2009

0 2New Road CollectorYale Ave Cherry Creek Wabash StApCo-2001-09

2 6Add through lane(s) PrincipalQuincy Ave Reservoir Rd Plains PkwyApCo-2004-03

0 4New Road CollectorChenango/Cooperleaf Picadilly QuincyApCo-2005-05

4 6Add through lane(s) PrincipalSmoky Hill Road Gun Club Rd. Versaille PkwyApCo-2008-02

2 4Add through lane(s) Principal64th Avenue Kendrick St Terry St.Arvd-1995-08

6 6Grade Separation PrincipalWadsworth Bypass 55th Avenue Ralston RoadArvd-2002-05 2003-003

2 4Add through lane(s) Principal86th Parkway Jellision St 88th AveArvd-2007-01

2 4Add through lane(s) PrincipalW. 88th Avenue 86th Pkwy Independence WayArvd-2007-01

2 4New Road MinorGartell Road County Line Rd Inspiration DriveAura-1998-19

4 6New Road PrincipalArapahoe Road Liverpool Smoky Hill RoadAura-1998-24

2 6Add through lane(s) PrincipalSmoky Hill Road E-470 Glasglow DrAura-2001-12

0 2New Road PrincipalSheridan Pkwy Northwest Pkwy SH 7Brfd-2004-08

0 2New Road PrincipalBuckley Road 136th Avenue Bromley LaneBrgh-2004-01

0 6New Road MinorPrairie Center Parkway 144th Avenue Tower RoadBrgh-2005-11

0 2New Road CollectorTower Road Prairie Center Pkwy Bromley LaneBrgh-2005-12

2 4Add through lane(s) CollectorTower Road Prairie Center Pkwy Bromley LaneBrgh-2005-12

0 2New Road CollectorTelluride Street Bromley Lane Prairie Center PkwyBrgh-2005-13

2 4Add through lane(s) PrincipalSheridan Parkway Aspen Creek Drive 144th AvenueBrmf-2003-13

2 4Add through lane(s) MinorEast Midway Boulevard Lowell Boulevard 3000 feet east of LowelBrmf-2003-17

Page 1 of 39May 28, 2009


Through Lanes




4 6Add through lane(s) FreewayI-25 5th Street Meadows/Founders PaCDT1-1998-05 1999-001

4 6Add through lane(s) FreewayI- 25 SH-52 SH-66CDT4-2008-05

6 6Add Ramp(s) RampI-25 I-25 SB SH-270 EBCDT6-1995-64 1995-332b

4 4Interchange Reconstruction FreewayI-270 I-25CDT6-1995-64 1995-332b

4 4Interchange Reconstruction RampI-270 I-270 EB I-76 EBCDT6-1995-64 1995-332b

0 1Add Ramp(s) RampI-70 I-70 EB SH-58 WBCDT6-1998-05 1999-008

3 3Interchange Reconstruction FreewayI-70 SH-58CDT6-1998-05 1999-008

0 1Add Ramp(s) RampSH-58 SH-58 EB I-70 WBCDT6-1998-05 1999-008

4 6Bridge Principal120th Avenue I-25 west ramps I-25 east rampsCDT6-2001-01 2001-156

5 6Add through lane(s) PrincipalFederal Blvd Alameda Avenue 6th AvenueDenv-1996-01 2001-169

6 8Add through lane(s) FreewayPena Boulevard E-470 east ramps 78th/75th Ave rampsDenv-1997-01

4 6Add through lane(s) FreewayPena Boulevard 78th/75th Ave ramps Jackson Gap St west rDenv-1997-01

0 4New Road PrincipalCentral Park Blvd Martin Luther King Blvd 36th AveDenv-2001-07

4 4Reclassified PrincipalMartin Luther King Blvd Central Park Blvd Fulton StDenv-2001-11

4 4New Road PrincipalMartin Luther King Blvd Fulton St Iola Street.Denv-2001-13

2 4Add through lane(s) PrincipalTower Road 38th Ave. 48th AveDenv-2001-16

0 2New Road CollectorMaxwell Place Chambers Rd Memphis StreetDenv-2001-19

3 4Add through lane(s) Minor 78th Avenue Gun Club Rd Employee ParkingDenv-2003-18

0 4New Road Minor 38th Avenue Himalaya PicadillyDenv-2005-02

Page 2 of 39May 28, 2009


Through Lanes




0 4New Road Collector35th Ave Syracuse Central Park BoulevardDenv-2005-14

0 2New Road Collector35th Ave Akron St. Havana St.Denv-2005-14

0 2New Road Collector35th Ave Central Park Boulevard Akron St.Denv-2005-14

2 4Add through lane(s) MinorHavana Street Smith Road 40th AveDenv-2005-18

0 4New Road MinorHavana Street Florence Way MLK BlvdDenv-2005-19

0 2New Road MinorHavana Street (SB) MLK Blvd 26th AvenueDenv-2005-19

2 2Reduce Lanes MinorIola Street (NB) 26th Avenue MLK BlvdDenv-2005-19

4 4Highway Operational PrincipalQuebec St. 49th/47th Underway 53rdDenv-2006-24

2 4Add through lane(s) CollectorTown Center Drive Santa Fe Drive Cactus BluffDgCo-1998-07

2 4Add through lane(s) CollectorTown Center Drive Cactus Bluff Lucent BlvdDgCo-1998-07

2 2Grade Separation FreewayE-470 Jordan RdE470-2001-05

1 2Ramp widening RampE-470 Ramp Jordan Rd EB-E-470E470-2001-05

1 2Ramp widening RampE-470 Ramp E-470 WB Jordan RdE470-2001-05

2 4Add through lane(s) PrincipalLeon A. Wurl Pkwy 119th St. Meller St.Erie-1999-03

2 4Add through lane(s) PrincipalLeon A. Wurl Pkwy County Line Rd Coal CreekErie-1999-03

2 4Add through lane(s) PrincipalLeon A. Wurl Pkwy Meller St. County Line RoadErie-1999-03

2 4Add through lane(s) CollectorPeakview Ave/Dayton Boston Street Dayton StreetGrnV-2006-01

0 2New Road CollectorPlaza Drive Lucent Blvd. County LineHlRn-1997-02

0 4New Road MinorYale Avenue Rooney Rd Bear Creek BlvdLakw-1995-08

0 4New Road MinorMcIntyre Street Alameda Ave. Morrison RdLakw-1995-09

Page 3 of 39May 28, 2009


Through Lanes




0 2New Road CollectorSky Ridge Ave Ridgegate Parkway Park Meadows Blvd.Ltre-2007-02

2 4Add through lane(s) Principal136th Avenue Zuni St Huron StreetMV20-2020-009

2 4Add through lane(s) Principal144th Avenue York St Colorado BlvdMV20-2020-013

2 6Add through lane(s) PrincipalBromley Lane Sable Boulevard Chambers RoadMV20-2020-047

2 4Add through lane(s) PrincipalEast County Line Road 3rd Avenue Ute RoadMV20-2020-065

0 2New Road PrincipalPlum Creek Parkway Gilbert Street Ridge RoadMV20-2020-152

2 2Reconstruction PrincipalRidge Road Plum Creek Parkway SH-86MV20-2020-163

2 4Add through lane(s) PrincipalTower Road 48th Ave 56nd AveMV20-2020-183

2 4Add through lane(s) PrincipalWashington Street 136th Avenuee 144th AvenueMV20-2020-204

2 6Add through lane(s) Principal56th Avenue Quebec Central Park BoulevardMV30-2030-030 2007-082

5 6Add through lane(s) PrincipalColfax Avenue Peoria St Potomac StMV30-2030-107

0 2New Road PrincipalChambers Road Mainstreet Lincoln AvenuePark-2003-08

0 1Add Ramp(s) RampE-470 E-470 NB Gun Club RdRTP -2001-228

0 1Add Ramp(s) RampE-470 Gun Club Rd E-470 NBRTP -2001-228

4 4Interchange Reconstruction FreewayE-470 I-70RTP -2001-228

0 1Add Ramp(s) RampE-470 E-470 NB I-70 WBRTP -2001-228

0 1Add Ramp(s) RampE-470 E-470 SB Gun Club RdRTP -2001-228

0 2New Road CollectorRelocated Colfax Ave Picadilly Rd Powhaton RdRTP -2001-228

3 4Add through lane(s) Principal 72nd Avenue Sheridan Boulevard .25 mi. e/o Sheridan BlRTP -2001-58

Page 4 of 39May 28, 2009


Through Lanes




4 6Add through lane(s) Principal Sheridan Blvd 70th Ave. 74th Ave.RTP -2001-58

2 4Add through lane(s) CollectorHolly St. 138th Ave 140th AveThor-2001-30

2 4Add through lane(s) Principal120th Avenue Holly Street east Quebec StreetThor-2002-01 2003-039

2 4Add through lane(s) Principal144th Avenue Washington St. York St.Thor-2006-06

2 4Add through lane(s) CollectorHolly Street 123rd Ave. 128th Ave.Thor-2006-09

2 4Add through lane(s) Principal88th Ave Dahia St 300ft eastThor-2006-19

2 4Add through lane(s) MinorWashington Street 160th Ave. 164th AveThor-2006-22

2 6Add through lane(s) MinorWashington Street 164th Ave. SH-7Thor-2006-22

2 4Bridge Freeway128th Ave West approach east approachThor-2006-25 2007-147

0 1Add Ramp(s) RampCabela Interchange Cabela Dr. SH-58 EBWhRd-2006-02

0 1Add Ramp(s) RampCabela Interchange Cabela Dr. SH-58 WBWhRd-2006-02

0 1Add Ramp(s) RampCabela Interchange SH-58 WB Cabela DrWhRd-2006-02

0 1Add Ramp(s) RampCabela Interchange SH-58 EB Cabela Dr.WhRd-2006-02

4 4New Interchange FreewaySH-58 Cabela InterchangeWhRd-2006-02

0 0park-n-RidePicadilly/Smoky Hill Rd Smoky Hill Rd.RTD -1996-18

0 0Transit Passenger FacilitiesFasTracks CMAQ Proj US-36RTD -2005-03 2007-044

Transit Passenger Facilities StationAlameda Avenue Sable BlvdRTD-2004-03 2005-067

Page 5 of 39May 28, 2009


Through Lanes




2 4Add through lane(s) PrincipalPecos Street 52nd Avenue I-76AdCo-1995-05

2 4Add through lane(s) PrincipalWashington Street 58th Avenue SH-224AdCo-1998-01

Grade Separation PrincipalPecos Street 60th AvenueAdCo-2005-02 2005-099

0 2Add Ramp(s) RampArapahoe Rd EB Arapahoe Rd SB Parker RdApCo-2003-04 2005-044

0 1Add Ramp(s) RampArapahoe Rd WB Arapahoe Rd NB Parker RdApCo-2003-04 2005-044

0 2Add Ramp(s) RampArapahoe Rd EB Arapahoe Rd NB Parker RdApCo-2003-04 2005-044

0 2New Road CollectorCastilla Ave/Lewiston Parker/Castilla Arapahoe/Lewiston WaApCo-2003-04 2005-044

6 6New Interchange Major RegionalParker Rd Arapahoe RdApCo-2003-04 2005-044

2 6Add through lane(s) PrincipalGun Club Road Quincy Ave 1.5 Miles SouthApCo-2003-23

2 6Add through lane(s) PrincipalQuincy Ave Plains Pkwy Gun Club RdApCo-2004-03

2 4Grade Separation Minor80th Avenue UPRRArvd-1995-03

2 4Add through lane(s) Minor80th Avenue Alkire Street Kipling StreetArvd-1995-03

4 6Add through lane(s) PrincipalTower Road Smith Rd I-70Aura-1989-01

2 6Add through lane(s) Principal 6th Avenue Airport Blvd Tower RdAura-1996-08

2 6Add through lane(s) PrincipalJewell Avenue Gun Club Rd Harvest Rd.Aura-1996-14

0 2New Road Principal 6th Parkway SH-30 E-470Aura-1997-01

0 2New Road PrincipalTower Road 6th Avenue Colfax AvenueAura-1998-13

2 4Add through lane(s) CollectorMississippi Avenue Gun Club Road Harvest RdAura-1998-16

0 2New Road PrincipalHarvest Mile Road 56th Avenue DIA boundary line/64th Aura-1998-17

Page 6 of 39May 28, 2009


Through Lanes




0 4New Road MinorGun Club Road Mississippi Avenue SH-30Aura-1998-22

2 6Add through lane(s) Principal6th Avenue/SH30 Tower Rd 6th PkwyAura-2004-06

2 6Add through lane(s) Principal 6th Avenue E-470 Gun Club RdAura-2004-08

2 6Add through lane(s) PrincipalPicadilly Rd 6th Ave Colfax AveAura-2004-09

0 6New Road PrincipalPicadilly Rd 48th Ave 56th AvenueAura-2004-11

0 6New Road PrincipalPicadilly Rd Colfax Ave I-70Aura-2004-13

0 2New Road CollectorInspiration Drive Picadilly Section Line 1/4 mile west of HarvesAura-2005-01

0 4New Road CollectorCounty Line Road Monaghan Section line Hayesmount RoadAura-2005-02

0 2New Road CollectorMonaghan Road County Line Dry CreekAura-2005-03

0 4New Road Minor 38th Avenue Himalaya PicadillyAura-2005-06

2 6Add through lane(s) Principal 56th Ave Picadilly Rd E-470Aura-2006-01

2 4Add through lane(s) PrincipalArapahoe Rd CherryVale Rd Votec EntranceBlCo-2004-01

2 2Highway Operational PrincipalArapahoe Rd Votec Entrance Rd 75th StBlCo-2004-01

2 4Add through lane(s) Principal144th Avenue Sheridan Blvd Zuni StreetBrfd-1995-11

2 4New Road PrincipalSouth Boulder Rd/160t Boulder/Broomfield Co. Lowell BlvdBrfd-2000-20

2 4Add through lane(s) PrincipalSimms Street 108th Ave 112th AveBrfd-2001-10

2 4Add through lane(s) PrincipalSheridan Blvd Lowell Boulevard NW ParkwayBrfd-2004-01

1 1Add Ramp(s) RampI-25 NB Off-Ramp I-25 NB SH-7Brfd-2004-03

1 1Add Ramp(s) RampI-25 SB Off-Ramp I-25 SB SH-7Brfd-2004-03

Page 7 of 39May 28, 2009


Through Lanes




2 4Interchange Reconstruction FreewaySH-7 West I-25 Ramps East I-25 RampsBrfd-2004-03

1 1Add Ramp(s) RampSH-7 EB Loop Ramp SH-7 I-25 NBBrfd-2004-03

0 1Add Ramp(s) RampSH-7 EB On-Ramp SH-7 I-25 SBBrfd-2004-03

0 1Add Ramp(s) RampSH-7 WB Loop Ramp SH-7 I-25 SBBrfd-2004-03

1 1Add Ramp(s) RampSH-7 WB On-Ramp SH-7 I-25 NBBrfd-2004-03

2 6Add through lane(s) PrincipalSH-7 Sheridan Pkwy I-25Brfd-2004-06

2 6Add through lane(s) PrincipalSheridan Pkwy Northwest Pkwy SH-7Brfd-2004-08

4 6Add through lane(s) PrincipalBromley Lane Hwy 85 Sable BlvdBrgh-2003-08

0 4New Road CollectorTower Road Bridge Street Bromley LaneBrgh-2003-09

4 4New Interchange FreewayI-76/Bridge Street Inter I-76 SH-7Brgh-2008-01

0 2New Road CollectorHoyt Street Midway Boulevard Industrial LaneBrmf-2003-09

2 4Add through lane(s) Principal144th Avenue US-287 Sheridan BlvdBrmf-2005-01

2 4Add through lane(s) MinorLowell Boulevard 120th Avenue 128th AvenueBrmf-2005-03

2 4Add through lane(s) MinorLowell Boulevard 128th Avenue 136th AvenueBrmf-2005-10

0 4Bridge Minor112th Avenue Old Wadsworth Over US-36 to 112th ABrmf-2005-11

0 2New Road CollectorParkland Street Wadsworth Blvd Uptown AvenueBrmf-2005-34

0 6New Road Major Regional120th Ave Wadsworth Blvd Allison St.Brmf-2005-35 2007-029

2 4Add through lane(s) PrincipalSH- 7 Boulder County Line Sheridan ParkwayBrmf-2006-01

0 4New Road CollectorAllison St 120th Avenue Commerce StreetBrmf-2006-02

Page 8 of 39May 28, 2009


Through Lanes




2 6Add through lane(s) PrincipalHuron St 160th Ave SH-7Brmf-2007-15

0 2New Road MinorFrontage Road (East of Castle Pines Interchan Ridgegate ParkwayCDT1-1998-05 1999-001

8 10Add through lane(s) FreewayI-25 Lincoln Ave C-470 South RampCDT1-1998-05 1999-001

6 6Intelligent Transportation Sys FreewayI-25 Plum Creek PkwyCDT1-1998-05 1999-001

4 6Add through lane(s) FreewayI-25 Douglas Lane 5th StreetCDT1-1998-05 1999-001

6 8Add through lane(s) FreewayI-25 Meadows/Founders Pa Ridgegate ParkwayCDT1-1998-05 1999-001

6 8Add through lane(s) FreewayI-25 Ridgegate Parkway Lincoln AvenueCDT1-1998-05 1999-001

2 4Add through lane(s) Major RegionalUS- 85 SH-67 (Sedalia) Daniels ParkCDT1-2001-02 2001-154

2 4Add through lane(s) Major RegionalUS- 85 MP191.75 SH-67 (Sedalia)CDT1-2001-02 2001-154

4 4Add through lane(s) Major RegionalUS- 85 Highlands Ranch Pkwy Titan RdCDT1-2001-02 2001-154

2 4Add through lane(s) Major RegionalUS- 85 Titan Rd Cook Ranch (MP 194.8CDT1-2001-02 2001-154

0 1Add Ramp(s) RampUS 285 US-285 SB Shaffer's CrossingCDT1-2003-02 2003-124

0 1Add Ramp(s) RampUS 285 Richmond Hill Rd US-285 NBCDT1-2003-02 2003-124

0 1Add Ramp(s) RampUS 285 Richmond Hill Rd US-285 SBCDT1-2003-02 2003-124

0 1Add Ramp(s) RampUS 285 US-285 NB Richmond Hill RdCDT1-2003-02 2003-124

0 1Add Ramp(s) RampUS 285 US-285 SB Richmond Hill RdCDT1-2003-02 2003-124

2 4Add through lane(s) Major RegionalUS 285 Richmond Hill Rd Foxton RdCDT1-2003-02 2003-124

0 1Add Ramp(s) RampUS 285 Shaffer's Crossing US-285 SBCDT1-2003-02 2003-124

0 1Add Ramp(s) RampUS 285 US-285 NB Shaffer's CrossingCDT1-2003-02 2003-124

2 4Grade Separation Major RegionalUS 285 Shaffer's CrossingCDT1-2003-02 2003-124

0 1Add Ramp(s) RampUS 285 Shaffer's Crossing US-285 NBCDT1-2003-02 2003-124

Page 9 of 39May 28, 2009


Through Lanes




2 4Grade Separation Major RegionalUS-285 Richmond RdCDT1-2003-02 2003-124

3 4New Interchange Major RegionalUS 285 Shaffers CrossingCDT1-2004-08

0 1Add Ramp(s) RampUS 285 US 285 NB Shaffers CrossingCDT1-2004-08

0 1Add Ramp(s) RampUS 285 US 285 SB Shaffers CrossingCDT1-2004-08

0 1Add Ramp(s) RampUS 285 Shaffers Crossing US 285 SBCDT1-2004-08

0 1Add Ramp(s) RampUS 285 Shaffers Crossing US 285 NBCDT1-2004-08

2 4Add through lane(s) PrincipalSH 66 Hover Road US 287 (Longmont)CDT4-1998-04 1999-026

4 6Add through lane(s) FreewayI-225 North Ramps of Alame 6th AveCDT6-1998-04 1999-006

4 6Add through lane(s) FreewayI-225 North Ramps of Missis North Ramps of AlameCDT6-1998-04 1999-006

8 8Interchange Reconstruction FreewayUS-6 Federal BlvdCDT6-2007-25 2007-171

2 4Add through lane(s) MinorPrairie Hawk Drive Meadows Pkwy. Wolfensberger Rd.CRck-1995-01

0 4New Road CollectorWoodlands Blvd. Dales Pony Circle Scott Blvd.CRck-1995-04

4 6Add through lane(s) FreewayPena Boulevard Tower Road E-470 east rampsDenv-1997-01

2 4Add through lane(s) PrincipalWashington Street Elk Place 52nd AvenueDenv-1998-02

4 6Add through lane(s) FreewayPena Blvd I-70 Tower RdDenv-1999-01

6 8Add through lane(s) FreewayPena Boulevard Jackson Gap St. west r DIA TerminalDenv-1999-15

0 4New Road CollectorAirport Way 48th Ave 56th AveDenv-2001-22

0 1Add Ramp(s) RampHavana St Hanana St I-70 WBDenv-2002-49 2007-083

0 1Add Ramp(s) RampHavana St Hanana St I-70 EBDenv-2002-49 2007-083

2 2Add Ramp(s) RampI-270 I-270 SB I-70 EBDenv-2002-49 2007-083

Page 10 of 39May 28, 2009


Through Lanes




0 1Add Ramp(s) RampI-270 I-270 SB Central Park BlvdDenv-2002-49 2007-083

0 1Add Ramp(s) RampI-70 I-70 EB Central Park BlvdDenv-2002-49 2007-083

New Interchange FreewayI-70 Central Park BlvdDenv-2002-49 2007-083

New Interchange FreewayI-70 Havana StDenv-2002-49 2007-083

2 2Add Ramp(s) RampI-70 I-70 WB I-270 NBDenv-2002-49 2007-083

0 1Add Ramp(s) RampI-70 I-70 WB Hanana StDenv-2002-49 2007-083

0 4New Road MinorNorth I-70 Frontage Rd Havana St Central Park BlvdDenv-2002-49 2007-083

0 4New Road MinorSouth I-70 Frontage Rd Central Park Blvd Havana StDenv-2002-49 2007-083

4 6Add through lane(s) PrincipalEvans Avenue Colorado Blvd I-25Denv-2004-03

2 4Add through lane(s) Principal56th Avenue Himalaya St Picadilly RdDenv-2004-04

0 4New Road PrincipalCentral Park Blvd 49th Ave 56th AveDenv-2005-04

0 6New Road PrincipalCentral Park Blvd. 36th Ave Smith RoadDenv-2005-15

0 6New Road PrincipalCentral Park Blvd Smith Road 49th AveDenv-2005-16

0 1Add Ramp(s) RampBroadway I-25Denv-2005-24

6 6Add through lane(s) PrincipalBroadway Kentucky Ave ExpositionDenv-2005-24

6 8Add through lane(s) PrincipalBroadway Mississippi Ave Kentucky AveDenv-2005-24

0 2New Road Minor71st Avenue Tower Rd Dunkirk StDenv-2006-12

0 6New Road Minor71st Avenue Telluride St Tower RdDenv-2006-12

0 4New Road CollectorHighpointe Blvd Dunkirk St Tower RdDenv-2006-13

0 4New Road MinorTelluride St 40th Ave 71st AveDenv-2006-14

Page 11 of 39May 28, 2009


Through Lanes




0 2New Road CollectorArgonne St 56th Ave 71st AveDenv-2006-16

0 4New Road MinorDunkirk St 56th Ave 64th AveDenv-2006-17

0 4New Road Collector45th Avenue Tower Rd Chambers RdDenv-2006-18

0 4New Road MinorHavana Street/Iola Stre Florence Way Smith RoadDenv-2006-23

0 2New Road MinorDallas Street 51st 56thDenv-2006-25

0 4New Road CollectorTelluride Street 40th Ave 71st AveDenv-2007-02

0 4New Road Collector60th Avenue Tower Rd Telluride StDenv-2007-03

0 4New Road Principal64th Avenue Dunkirk Rd Pena BlvdDenv-2007-04

0 4New Road Collector67th Avenue Tower Rd Telluride StDenv-2007-05

0 4New Road CollectorYampa Street 40th Ave 72nd AveDenv-2007-06

2 4Add through lane(s) MinorWewatta Street Speer Blvd 23rd St / Park AveDenv-2007-08

0 4New Road PrincipalMartin Luther King Blvd Havana St/Iola St Peoria StDenv-2009-02

4 6Add through lane(s) PrincipalLincoln Avenue 1st Street Keystone BlvdDgCo-1993-03

0 4New Road CollectorTown Center Drive Lucent Blvd Highlands Ranch PkwyDgCo-1998-07

0 2New Interchange FreewayDouglas Lane West I-25 Frontage Rd East I-25 Frontage RdDgCo-2000-02

0 1Add Ramp(s) RampDouglas Lane Douglas Lane I-25 NBDgCo-2000-02

0 1Add Ramp(s) RampDouglas Lane Douglas Lane I-25 SBDgCo-2000-02

0 1Add Ramp(s) RampI-25 I-25 SB Douglas LaneDgCo-2000-02

0 1Add Ramp(s) RampI-25 I-25 NB Douglas LaneDgCo-2000-02

Page 12 of 39May 28, 2009


Through Lanes




0 2New Road PrincipalHess Rd I-25 Castle Pine/Hess RoadDgCo-2000-10

0 2New Road PrincipalHess Rd Castle Pines Rd/Hess Newland GulchDgCo-2000-10

0 2New Road PrincipalHess Rd Newland Gulch Chambers RdDgCo-2000-10

4 6Interchange Reconstruction PrincipalSanta Fe Dr C-470 South ramps C-470 north rampsDgCo-2003-03 2003-112

2 4Add through lane(s) PrincipalHilltop Rd Canterberry Pkwy Singing Hills RdDgCo-2004-09

0 4New Road PrincipalStroh Rd Chambers Rd Crowfoot Valley RdDgCo-2006-04

0 2New Road PrincipalCanyons Pkwy (Arterial Crowfoot Valley Rd Hess RdDgCo-2008-01

4 4New Interchange FreewayE-470 PotomacE470-2005-02

0 1Add Ramp(s) FreewayE-470 E-470 NB Potomac StE470-2005-02

0 1Add Ramp(s) FreewayE-470 Potomac St E-470 SBE470-2005-02

0 1Add Ramp(s) FreewayE-470 Potomac St E-470 NBE470-2005-02

0 1Add Ramp(s) FreewayE-470 E-470 SB Potomac StE470-2005-02

2 4Add through lane(s) PrincipalLeon A. Wurl Pkwy US-287 119th St.Erie-1999-03

2 4Add through lane(s) MinorLeon A. Wurl Parkwy Coal Creek Weld CR 5Erie-2008-01

Grade Separation Rapid TransitGold Line LRT 23rd StFsTr-2003-18

Grade Separation Rapid TransitUS-36 BRT 23rd StFsTr-2003-18

2 4Add through lane(s) PrincipalChatfield Avenue Garrison Street Wadsworth BlvdJfCo-2006-02

0 2New Road PrincipalSouth Boulder Rd/160t 120th St Boulder/Broomfield CoLaf -2009-01

0 1Add Ramp(s) RampAlameda Avenue Alameda Avenue NB C-470Lakw-1995-07

2 4New Interchange PrincipalAlameda Avenue West C-470 Ramp East E-470 RampLakw-1995-07

Page 13 of 39May 28, 2009


Through Lanes




0 1Add Ramp(s) RampAlameda Avenue Alameda Avenue SB C-470Lakw-1995-07

0 1Add Ramp(s) RampC-470 SB C-470 Alameda AveLakw-1995-07

0 1Add Ramp(s) RampC-470 NB C-470 Alameda AveLakw-1995-07

4 6Add through lane(s) PrincipalWadsworth Blvd US-285 South. Ramps US-285 North rampsLakw-2007-08

3 4Add through lane(s) MinorDry Creek Rd Broadway Mineral AveLitl-2005-01

2 4Add through lane(s) PrincipalNelson Rd 75th St Affolter DrLong-2004-02

2 4Add through lane(s) Principal 17th Avenue Alpine St. East County Line RdLong-2004-03

0 2New Road CollectorMartin Street Ken Pratt Blvd/SH-119 1st AveLong-2005-03

4 4Interchange Reconstruction FreewayUS-36 McCaslin BlvdLou -2005-01 2007-032

2 4Add through lane(s) PrincipalRidgegate Pkwy Lincoln Ave I-25Ltre-2004-01

4 6Add through lane(s) PrincipalLincoln Avenue I-25 Peoria StreetLtre-2006-01

0 4New Road MinorSky Ridge Avenue Park Meadows Peoria StLtre-2007-01

New Road CollectorHavana St Lincoln Ave. RidgeGate ParkwayLtre-2007-03

4 6Add through lane(s) PrincipalLincoln Ave Peoria St 1st AveLtre-2007-05

2 4Add through lane(s) Principal 58th Avenue Washington Street York StreetMV20-2020-020

3 6Add through lane(s) Principal 6th Ave 6th Pkwy Harvest Mile RdMV20-2020-025

2 6Add through lane(s) PrincipalAlameda Avenue McIntyre St Rooney RdMV20-2020-035

2 4Add through lane(s) PrincipalAlameda Avenue Bear Creek Boulevard McIntyre StMV20-2020-035

0 2New Road PrincipalBayou Gulch/Chamber Parker Road Southern Boundary of MV20-2020-043

Page 14 of 39May 28, 2009


Through Lanes




4 6Add through lane(s) PrincipalBromley Lane Chambers Road 27th/BuckleyMV20-2020-047

0 2New Road PrincipalChambers Road Newlin Gulch Blvd MainstreetMV20-2020-056

2 4Add through lane(s) PrincipalChambers Road Hess Road Newlin Gulch RoadMV20-2020-056

2 4Add through lane(s) PrincipalCrowfoot Valley Road Macanta Rd Chambers RdMV20-2020-059

2 6Add through lane(s) PrincipalJewell Avenue E-470 Gun Club RdMV20-2020-096

2 4Add through lane(s) PrincipalMainstreet Canterberry Pkwy Tomahawk RdMV20-2020-110

2 4Add through lane(s) PrincipalMeadows Parkway Coachline Road Meadows BlvdMV20-2020-114

2 4Add through lane(s) PrincipalPace Street 3rd Avenue Ute RoadMV20-2020-138

2 6New Road PrincipalPicadilly Road I-70 Smith RoadMV20-2020-146

2 4Add through lane(s) PrincipalQuincy Avenue Kipling Street Carr StreetMV20-2020-161

0 4New Road PrincipalMainstreet Peoria St Chambers RdMV20-2020-171

4 6Add through lane(s) PrincipalThornton Pkwy Grant Street Washington StreetMV20-2020-182

2 4Add through lane(s) PrincipalTower Road 56th Avenue Pena BoulevardMV20-2020-184

2 6Add through lane(s) PrincipalTower Road Colfax Avenue Smith RdMV20-2020-186

2 4Add through lane(s) PrincipalWashington Street 144th Avenue 152nd AveMV20-2020-205

6 8Interchange Reconstruction PrincipalWadsworth Blvd US-6 south ramps US-6 north rampsMV30-2030-004

2 6Add through lane(s) Principal 48th Avenue Chambers Rd Tower RdMV30-2030-027

2 6Add through lane(s) Principal56th Avenue Central Park Boulevard Havana StreetMV30-2030-030 2007-082

2 6Add through lane(s) PrincipalGun Club Road Quincy Ave Yale AveMV30-2030-035

Page 15 of 39May 28, 2009


Through Lanes




2 4Add through lane(s) PrincipalHampden Avenue Himalaya Rd Gun Club RdMV30-2030-037

2 4Add through lane(s) PrincipalHess Road Chambers Rd Motsenbocker RdMV30-2030-038

0 4New Road PrincipalHess Road Motsenbocker Rd Parker RdMV30-2030-038

2 4Add through lane(s) PrincipalQuincy Avenue Simms St Kipling PkwyMV30-2030-044

0 1Add Ramp(s) RampCastlegate NB On-Ram Castlegate Dr I-25 NBMV30-2030-059

0 1Add Ramp(s) RampCastlegate SB On-Ram Castlegate Dr I-25 SBMV30-2030-059

0 4New Interchange FreewayI-25 Castlegate DrMV30-2030-059

0 1Add Ramp(s) RampI-25 NB Off-Ramp I-25 NB Castlegate DrMV30-2030-059

0 1Add Ramp(s) RampI-25 SB Off-Ramp I-25 SB Castlegate DrMV30-2030-059

0 4New Road MinorNorth Meadows Dr. ext US-85 I-25MV30-2030-059

0 6New Road Principal 48th Avenue Picadilly Rd Powhaton RdMV30-2030-066

0 6New Road PrincipalHarvest Mile Road Jewell Ave I-70MV30-2030-075

0 4New Road PrincipalMainstreet/Ridgegate R I-25 Peoria StMV30-2030-077

8 10Add through lane(s) FreewayE-470 Peoria St Chambers RdMV30-2030-095

6 8Add through lane(s) FreewayE-470 I-25 Peoria StMV30-2030-095

6 8Add through lane(s) FreewayE-470 Chambers Rd Jordan RdMV30-2030-095

7 9Add through lane(s) FreewayE-470 Jordan Rd Parker RdMV30-2030-095

4 6Add through lane(s) FreewayE-470 Parker Rd Jewell AvenueMV30-2030-096

4 6Add through & HOV lanes FreewayE-470 Jewell Avenue I-70MV30-2030-096

4 6Add through lane(s) PrincipalBroncos Pkwy Easter St Potomac StMV30-2030-133

Page 16 of 39May 28, 2009


Through Lanes




2 6Add through lane(s) PrincipalHuron St 150th Ave 160th AveMV30-2030-137

2 6Add through lane(s) Principal 48th Avenue Imboden Rd Quail Run RdMV30-2030-138

0 1Add Ramp(s) RampCastle Gate Dr. Castle Gate Dr. EB US-85 SBMV30-2030-139

0 1Add Ramp(s) RampUS- 85 US-85 SB Castle Gate Dr. WBMV30-2030-139

0 1New Interchange Major RegionalUS- 85 US-85 Castle Gate Dr.MV30-2030-139

2 4Add through lane(s) Principal56th Avenue Tower Rd Himalaya StMV30-2030-163

2 4Add through lane(s) PrincipalChambers Road Mainstreet Lincoln AvenuePark-2003-08

4 6Add through lane(s) PrincipalLincoln Ave Keystone Blvd Parker RdPark-2007-02

2 4Add through lane(s) PrincipalCrowfoot Valley Road Chambers Rd Stroh RdPark-2007-03

2 4Add through lane(s) PrincipalCrowfoot Valley Rd Founders Pkwy Macanta RdPark-2007-04

2 4Add through lane(s) MinorCottonwood Drive Parker Road Jordan RoadPark-2008-03

2 4Add through lane(s) PrincipalJordan Road Bradbury Pkwy Hess RdPark-2008-04

0 4New Road MinorCottonwood Drive Jordan Road Chambers RoadPark-2008-08

0 2New Road PrincipalChambers Road Crowfoot Valley Road Stroh RdPark-2008-09

0 2New Road PrincipalChambers Road Southerly boundary To Crowfoot Valley RoadPark-2008-09

0 2New Road MinorGun Club Rd 6th Pkwy Smith RdRTP -2001-228

0 1Add Ramp(s) RampGun Club Rd Ramp Gun Club Rd E-470 SBRTP -2001-228

0 1Add Ramp(s) RampI-70 I-70 EB E-470 SBRTP -2001-228

4 6Add through lane(s) PrincipalBromley Lane Tower Rd I-76RTP -2003-001

Page 17 of 39May 28, 2009


Through Lanes




2 4Add through lane(s) Principal152nd Avenue Washington St. York StRTP -2003-003

2 4Add through lane(s) PrincipalYork Street 150nd Ave E-470RTP -2003-003

0 2New Road PrincipalQuincy Ave Irving St Federal BlvdSher-2007-01

2 4Add through lane(s) PrincipalColorado Blvd 152nd Ave 160th Ave/SH-7Thor-2004-01

2 4Add through lane(s) Principal104th Avenue Grandview Ponds McKay RdThor-2004-03

2 4Add through lane(s) Principal104th Ave (SH-44) Colorado Blvd .5 miles e/Colorado BlvThor-2006-02 2007-084

2 4Add through lane(s) CollectorHolly Street 136th Ave. 138th Ave.Thor-2006-07

2 4Add through lane(s) Collector136th Ave. Cherry St. Holly St.Thor-2006-08

2 4Add through lane(s) Minor112th Ave. Steele St. Colorado Blvd.Thor-2006-10

2 4Add through lane(s) PrincipalWashington Street 152nd Ave. 160th Ave.Thor-2006-21

2 4Add through lane(s) Collector160th Ave. I-25 Washington St.Thor-2006-23

2 4Add through lane(s) PrincipalWashington St 152nd Ave 164th AveThor-2007-02

2 4Add through lane(s) PrincipalYork St E-470 SH-7Thor-2007-03

2 4Add through lane(s) Minor112th Avenue Clay St. Huron St.West-2003-06

4 6Add through lane(s) PrincipalWadsworth Blvd 36th Ave 46th AveWhRd-2004-01

0 4New Road CollectorCabela Drive 58th Ave 32nd AveWhRd-2006-01

0 2New Road CollectorCabela Drive SH-58 38nd AveWhRd-2006-01

Interchange Reconstruction FreewayI-70 32nd AveWhRd-2006-03

0 1Add Ramp(s) RampRamp Cabela Dr 32nd AveWhRd-2006-03

Page 18 of 39May 28, 2009


Through Lanes




0 1Add Ramp(s) RampRamp I-70 Cabela DrWhRd-2006-03

0Add Ramp(s) RampRamp I-70 SB 32nd AveWhRd-2006-03

0 2New Road Collector41st Ave Cabela Dr Youngfield StWhRd-2006-04

1 0Remove Component FreewayI-25 Schweiger Rd RampsCDT1-1998-05 1999-001

1 0Remove Component FreewayI-25 Surrey Ridge Rd RampCDT1-1998-05 1999-001

0 0park-n-Ride Park-N-RideBroomfield pnR Reloca US 36RTD -1999-02

park-n-Ride StationWest Corridor Knox StationRTD -2005-02 2007-042

Rapid Transit Park-N-RideWest Corridor Jeff Co. Gov't CenterRTD -2005-02 2007-042

Rapid Transit Park-N-RideWest Corridor Federal CenterRTD -2005-02 2007-042

Rapid Transit Park-N-RideWest Corridor Oak StationRTD -2005-02 2007-042

Rapid Transit StationWest Corridor Garrison StationRTD -2005-02 2007-042

park-n-Ride Park-N-RideWest Corridor WadsworthRTD -2005-02 2007-042

Rapid Transit StationWest Corridor Lamar StationRTD -2005-02 2007-042

park-n-Ride StationWest Corridor Perry StationRTD -2005-02 2007-042

park-n-Ride Park-N-RideWest Corridor Federal StationRTD -2005-02 2007-042

Rapid Transit Park-N-RideWest Corridor DUS South Golden RdRTD -2005-02 2007-042

park-n-Ride Park-N-RideWest Corridor Sheridan StationRTD -2005-02 2007-042

Rapid Transit Park-N-RideUS-36 Corridor Commu DUS 1st /Terry StRTD -2005-04 2007-050

park-n-Ride Park-N-RideUS-36 Corridor Commu 30th/Pearl StRTD -2005-04 2007-050

park-n-Ride Park-N-RideUS-36 Corridor Commu US-36/Church Ranch RRTD -2005-04 2007-050

park-n-Ride Park-N-RideUS-36 Corridor Commu Gunbarrel RdRTD -2005-04 2007-050

Page 19 of 39May 28, 2009


Through Lanes




park-n-Ride Park-N-RideUS-36 Corridor Commu LouisvilleRTD -2005-04 2007-050

park-n-Ride Park-N-RideUS-36 Corridor Commu 71st/Lowell BlvdRTD -2005-04 2007-050

park-n-Ride Park-N-RideUS-36 Corridor Commu US-36/E Flatiron CircleRTD -2005-04 2007-050

park-n-Ride Park-N-RideEast Corridor Commut Smith/Peoria StRTD -2005-06 2007-052

park-n-Ride Park-N-RideEast Corridor Commut Smith/Peoria StRTD -2005-06 2007-052

park-n-Ride Park-N-RideEast Corridor Commut Central Park BlvdRTD -2005-06 2007-052

park-n-Ride Park-N-RideEast Corridor Commut Airport Blvd/40th AveRTD -2005-06 2007-052

Station StationEast Corridor Commut DIARTD -2005-06 2007-052

park-n-Ride StationEast Corridor Commut Colorado BlvdRTD -2005-06 2007-052

Rapid Transit Park-N-RideEast Corridor Commut Denver Union Terminal DIARTD -2005-06 2007-052

Rapid Transit Rapid TransitCentral Corridor Extens 30th/Downing St 40th St/40th AveRTD -2005-07 2007-053

park-n-Ride Park-N-RideGold Line LRT Arvada RidgeRTD -2005-08 2007-054

Rapid Transit Rapid TransitGold Line LRT DUS Ward RdRTD -2005-08 2007-054

park-n-Ride Park-N-RideGold Line LRT SheridanRTD -2005-08 2007-054

park-n-Ride Park-N-RideGold Line LRT Pecos StRTD -2005-08 2007-054

park-n-Ride Park-N-RideGold Line LRT Olde Town ArvadaRTD -2005-08 2007-054

park-n-Ride Park-N-RideGold Line LRT Federal BlvdRTD -2005-08 2007-054

park-n-Ride Park-N-RideGold Line LRT Ward RdRTD -2005-08 2007-054

Rapid Transit Rapid TransitNorth Metro Rail DUS SH-7RTD -2005-09 2007-055

park-n-Ride Park-N-RideNorth Metro Rail 88th AveRTD -2005-09 2007-055


Page 20 of 39May 28, 2009


Through Lanes







park-n-Ride Park-N-RideNorth Metro Rail GlobervilleRTD -2005-09 2007-055

Rapid Transit Park-N-RideNorth Metro Rail US-85/72nd AveRTD -2005-09 2007-055

Station StationI-225 LRT Corridor MontievRTD -2005-10 2007-056

park-n-Ride Park-N-RideI-225 LRT Corridor Dayton StRTD -2005-10 2007-056

park-n-Ride Park-N-RideI-225 LRT Corridor Iliff AveRTD -2005-10 2007-056

Rapid Transit Park-N-RideI-225 LRT Corridor Parker Rd East Corridor CommutRTD -2005-10 2007-056

park-n-Ride Park-N-RideI-225 LRT Corridor Aurora City CenterRTD -2005-10 2007-056

Station StationI-225 LRT Corridor City Center/ExpositionRTD -2005-10 2007-056

park-n-Ride StationI-225 LRT Corridor 2nd AveRTD -2005-10 2007-056

Station StationI-225 LRT Corridor ColfaxRTD -2005-10 2007-056

park-n-Ride Park-N-RideI-225 LRT Corridor Nine MileRTD -2005-10 2007-056

Rapid Transit StationDenver Union Station E 16th St/WynkoopRTD -2005-12 2007-057

Rapid Transit Park-N-RideSouthwest Corridor Ext C-470/Lucent BlvdRTD -2005-13 2007-058

Rapid Transit Rapid TransitSouthwest Corridor Ext Mineral Ave. Lucent Blvd/C-470RTD -2005-13 2007-058

park-n-Ride Park-N-RideSoutheast Corridor Ext Ridge Gate PkwyRTD -2005-14 2007-059

Station Park-N-RideSoutheast Corridor Ext Lone Tree Town CenteRTD -2005-14 2007-059

Station Park-N-RideSoutheast Corridor Ext Sky RidgeRTD -2005-14 2007-059

Rapid Transit Rapid TransitSoutheast Corridor Ext Lincoln Ave RidgegateRTD -2005-14 2007-059

Page 21 of 39May 28, 2009


Through Lanes




Transit Maintenance Rapid TransitCRMF 31st StreetRTD -2006-04 2007-066

0 0Transit Passenger Facilities StationPearl Street 30th Street 30th StreetRTD-2003-01 2005-037

Page 22 of 39May 28, 2009


Through Lanes




2 6Add through lane(s) PrincipalBuckley Road 118th Avenue Cameron DrAdCo-2000-06

0 6New Road PrincipalTower/Buckley Road 105th Ave 118th AveAdCo-2004-01

2 6Add through lane(s) Principal 96th Ave Tower Rd Picadilly RdAdCo-2004-03

0 6New Road PrincipalMonaghan Rd Quincy Ave Yale AveApCo-2004-01

4 6Add through lane(s) PrincipalBroncos Pkwy Havana St Peoria StApCo-2007-03

2 6Add through lane(s) PrincipalQuincy Ave Hayesmount Rd Watkins RdApCo-2007-08

2 6Add through lane(s) PrincipalWatkins Rd Quincy Ave I-70ApCo-2007-09

4 6Add through lane(s) PrincipalQuincy Ave Monaghan Rd HayesmountApCo-2007-10

2 6Add through lane(s) PrincipalYale Ave Monaghan Rd Hayesmount RdApCo-2007-11

2 4Add through lane(s) MinorDunkirk St Ceylon St Louisiana AveAura-1995-05

2 4Add through lane(s) MinorMississippi Avenue Tower Road Ceylon StAura-1995-05

2 6Add through lane(s) Principal 56th Avenue E-470 Imboden RoadAura-1996-03

2 6Add through lane(s) PrincipalTower Road 6th Avenue Colfax AvenueAura-1998-13

0 4New Road CollectorMississippi Avenue Harvest Rd Powhaton RdAura-1998-16

0 6New Road MinorAurora Parkway Parker Rd PicadillyAura-1998-23

2 4Add through lane(s) MinorAurora Parkway Gartrell Smoky Hill RdAura-1998-23

4 6Add through lane(s) MinorAurora Parkway Picadilly GartrellAura-1998-23

2 4New Road Principal 64th Avenue Harvest Road Powhaton RoadAura-1998-26

4 6Add through lane(s) PrincipalGun Club Rd Yale Ave. Mississippi Ave.Aura-1999-01

Page 23 of 39May 28, 2009


Through Lanes




2 4Add through lane(s) PrincipalGun Club Rd Yale Ave. Mississippi Ave.Aura-1999-01

2 4New Road CollectorHarvest Road Quincy Ave 1/2 mile south of BellevAura-2001-05

0 3New Road CollectorGlasgow Dr Smoky Hill Rd Monaghan Section LineAura-2001-08

2 6Add through lane(s) PrincipalPowhaton Rd Smoky Hill Rd County Line RdAura-2001-12

2 6Add through lane(s) PrincipalSmoky Hill Rd Glasglow Dr Powhaton RdAura-2001-12

0 2New Road Minor 17th Place I-225 NE ramp Potoma I-225 NE ramp PotomaAura-2002-13 2003-071

3 3Grade Separation FreewayI-225 Colfax AveAura-2002-13 2003-071

0 2Add Ramp(s) RampI-225: Colfax E side 17th Place I-225 NBAura-2002-13 2003-071

0 2New Road Frontage RoadI-225: Colfax E side Colfax Ave 17th PlaceAura-2002-13 2003-071

0 2New Road Frontage RoadI-225: Colfax W side 17th Place Colfax AveAura-2002-13 2003-071

0 2Add Ramp(s) RampI-225: Colfax W side I-225 SB 17th PlaceAura-2002-13 2003-071

0 2New Road CollectorPotomac connector Sand Creek Pkwy Potomac StAura-2002-13 2003-071

3 6Add through lane(s) PrincipalHarvest Mile Road 56th Ave 64th AveAura-2004-01

2 4Add through lane(s) Principal 64th Avenue Harvest Mile Road Powhaton RdAura-2004-02

2 6Add through lane(s) Principal6th Pkwy SH-30 E-470Aura-2004-03

2 6Add through lane(s) PrincipalPicadilly Rd Smith Road 48th AveAura-2004-10

0 6New Road PrincipalPicadilly Rd 56th Ave 64th AveAura-2004-12

0 6New Road PrincipalPicadilly Rd 64th Ave Aurora City LimitsAura-2004-12

0 4New Road Collector38th Avenue Imboden ManilaAura-2006-03

0 4New Road CollectorShumaker Rd SH-36 38th AvenueAura-2006-05

Page 24 of 39May 28, 2009


Through Lanes




2 4Add through lane(s) CollectorShumaker Rd 38th Avenue 48th AvenueAura-2006-05

2 6Add through lane(s) CollectorImboden Rd 56th Ave 64th AveAura-2006-06

2 6Add through lane(s) PrincipalYale Ave Hayesmount Rd Watkins RdAura-2007-03

2 4Add through lane(s) PrincipalBuckley Road 136th Avenue Bromley LaneBrgh-2004-01

0 6New Road Principal120th Avenue 120th Avenue Annex Emerald StBrmf-2006-05

4 4Add through lane(s) Major RegionalUS- 85 C-470 Highlands Ranch PkwyCDT1-2001-02 2001-154

2 4Add through lane(s) Major RegionalUS-85 Castlegate Pkwy Meadows PkwyCDT1-2001-02 2001-154

2 6Add through lane(s) PrincipalTower Road Pena Boulevard 105th AvenueCoCy-1995-34

2 6Add through lane(s) Principal120th Ave Tower Rd Picadilly RdCoCy-2007-02

2 6Add through lane(s) Principal120th Ave E-470 Tower RdCoCy-2007-03

0 6New Road PrincipalPicadilly Rd 96th Ave 120th AveCoCy-2007-04

0 2New Road CollectorValley Drive South Street Plum Creek PkwyCRck-1995-03

0 4Add through lane(s) MinorPrairie Hawk Drive Franktown Rd Plum Creek PkwyCRck-1995-08

2 4New Road MinorPrairie Hawk Drive Wolfensberger Road Franktown RdCRck-1995-08

4 6Add through lane(s) Principal56th Avenue Himalaya St Picadilly RdDenv-2004-04

4 6Add through lane(s) Principal56th Ave Pena Blvd Tower RdDenv-2004-05

0 6New Road PrincipalPicadilly Rd 80nd Ave 96th AveDenv-2004-07

4 6Grade Separation PrincipalAlameda Avenue Santa Fe Cherokee StreetDenv-2005-03

0 4New Road Collector40th Avenue Central Park Blvd Clinton StreetDenv-2005-17

Page 25 of 39May 28, 2009


Through Lanes




0 4New Road Principal 64th Avenue Tower Rd Denver/Aurora City LimDenv-2006-26

2 4New Road PrincipalHess Rd Newland Gulch Chambers RdDgCo-2000-10

2 4New Road PrincipalHess Rd Castle Pines Rd Newland GulchDgCo-2000-10

2 4Add through lane(s) PrincipalHess Rd I-25 Castle Pine/Hess RoadDgCo-2000-10

2 4Add through lane(s) PrincipalWaterton Rd South Platte River Rd Campfire StDgCo-2008-02

2 4Add through lane(s) PrincipalRampart Range Rd Waterton Rd Titan RdDgCo-2008-03

2 4Add through lane(s) PrincipalTitan Rd Rampart Range Rd Santa Fe Dr.DgCo-2008-04

4 4New Interchange FreewayE-470 QuebecE470-2005-03

0 1Add Ramp(s) RampE-470 E-470 SB Quebec StE470-2005-03

0 1Add Ramp(s) RampE-470 E-470 NB Quebec StE470-2005-03

0 1Add Ramp(s) RampQuebec St Quebec St E-470 SBE470-2005-03

0 1Add Ramp(s) RampQuebec St Quebec St E-470 NBE470-2005-03

4 6Add through lane(s) FreewayE-470 I-76 Pena BlvdE470-2007-07

2 4Add through lane(s) Principal 64th Avenue Himalaya Rd Harvest Mile RdMV20-2020-021

2 6Add through lane(s) Principal 64th Avenue Aurora City Limit Himalaya StMV20-2020-022

2 4Add through lane(s) Principal 96th Avenue SH-2 Buckley RoadMV20-2020-032

0 4New Road Principal 96th Avenue Buckley Road Tower RoadMV20-2020-033

2 4Add through lane(s) PrincipalChambers Road Newlin Gulch Blvd MainstreetMV20-2020-056

3 6Add through lane(s) PrincipalJewell Avenue Himalaya Rd E-470MV20-2020-095

Page 26 of 39May 28, 2009


Through Lanes




2 4New Road PrincipalPlum Creek Parkway Gilbert Street Ridge RoadMV20-2020-152

2 4Add through lane(s) PrincipalRidge Road Plum Creek Parkway SH-86MV20-2020-163

2 4Add through lane(s) PrincipalStroh Rd J. Morgan Blvd Crowfoot ValleyMV20-2020-178

4 6Add through lane(s) PrincipalTower Road 48th Ave 56nd AveMV20-2020-183

2 4Add through lane(s) PrincipalWolfensberger Road Coachline Road I-25MV20-2020-206

0 2New Road Minor 17th Place I-225 NE ramp Potoma I-225 NE ramp PotomaMV20-2020-223

3 3Interchange Reconstruction FreewayI-225 Colfax AveMV20-2020-223

0 2New Road Frontage RoadI-225: Colfax E side Colfax Ave 17th PlaceMV20-2020-223

0 2Add Ramp(s) RampI-225: Colfax E side 17th Place I-225 NBMV20-2020-223

0 2New Road Frontage RoadI-225: Colfax W side 17th Place Colfax AveMV20-2020-223

0 2Add Ramp(s) RampI-225: Colfax W side I-225 SB 17th PlaceMV20-2020-223

0 2New Road CollectorPotomac connector Sand Creek Pkwy Potomac StMV20-2020-223

4 6Interchange Reconstruction PrincipalWadsworth Blvd 6th Ave 14th AveMV30-2030-004

2 6Add through lane(s) PrincipalImboden Rd 48th Ave 56th AveMV30-2030-040

2 4Add through lane(s) CollectorManila Rd I-70 38th AvenueMV30-2030-042

2 4Add through lane(s) CollectorManila Rd 38th Ave 48th AveMV30-2030-042

2 4Add through lane(s) PrincipalQuebec Street 120th Ave 128th AveMV30-2030-043

2 4Add through lane(s) PrincipalYork St 160th Ave (SH-7) 168th AveMV30-2030-051

0 1Add Ramp(s) RampHarvest Miles Rd Harvest Miles Rd I-70 EBMV30-2030-061

0 1Add Ramp(s) RampHarvest Miles Rd Harvest Miles Rd I-70 WBMV30-2030-061

Page 27 of 39May 28, 2009


Through Lanes




4 4New Interchange FreewayI-70 Harvest Miles Rd Harvest Miles RdMV30-2030-061

0 1Add Ramp(s) RampI-70 I-70 EB Harvest Miles RdMV30-2030-061

0 1Add Ramp(s) RampI-70 I-70 WB Harvest Miles RdMV30-2030-061

0 4New Road Principal 64th Avenue Powhaton Rd Monaghan RdMV30-2030-068

0 4New Road Minor 6th Avenue Powhaton Rd Monaghan RdMV30-2030-069

0 6New Road PrincipalHarvest Mile Road I-70 56th AveMV30-2030-074

0 4New Road PrincipalPicadilly Road Jewell Ave 6th Ave PkwyMV30-2030-080

0 6New Road PrincipalQuail Run Rd I-70 48th AveMV30-2030-081

4 6New Interchange FreewayI-70 Picadilly RdMV30-2030-083

0 1Add Ramp(s) RampI-70 I-70 WB Picadilly RdMV30-2030-083

0 1Add Ramp(s) RampI-70 I-70 EB Picadilly RdMV30-2030-083

0 1Add Ramp(s) RampPicadilly Rd Picadilly Rd I-70 EBMV30-2030-083

0 1Add Ramp(s) RampPicadilly Rd Picadilly Rd I-70 WBMV30-2030-083

4 6Add through lane(s) PrincipalAlameda Avenue Colorado Blvd Cherry Creek Dr NMV30-2030-125

4 6Add through lane(s) PrincipalAlameda Avenue Cherry Creek Dr N Steele StMV30-2030-125

2 4Add through lane(s) PrincipalQuebec Street 132nd Ave 160th AveMV30-2030-142

0 6New Road Principal 48th Avenue Powhaton Rd Monaghan RdMV30-2030-147

2 6Add through lane(s) Principal56th Avenue Havana Street Pena BlvdMV30-2030-156

2 4New Road PrincipalSouthwest Ring Rd E of Auburn Dr I-25MV30-2030-159

2 4Add through lane(s) PrincipalSouthwest Ring Rd Wolfensburger Rd E of Auburn DrMV30-2030-160

Page 28 of 39May 28, 2009


Through Lanes




2 4Add through lane(s) PrincipalSouthwest Ring Rd Meadows Pkwy Wolfensburger RdMV30-2030-160

4 6Add through lane(s) Principal56th Avenue Tower Rd Himalaya StMV30-2030-163

2 6Add through lane(s) Principal120th Avenue Sable Blvd E-470RTP -2001-08

0 1Add Ramp(s) RampI-25 I-25 NB RidgegateRTP -2001-227

0 1Add Ramp(s) RampI-25 I-25 SB RidgegateRTP -2001-227

New Interchange FreewayI-25 RidgegateRTP -2001-227

0 1Add Ramp(s) RampRidgegate Ridgegate I-25 SBRTP -2001-227

0 1Add Ramp(s) RampRidgegate Ridgegate I-25 NBRTP -2001-227

0 1Add Ramp(s) RampE-470 E-470 SB I-70 WBRTP -2001-228

2 4Add through lane(s) PrincipalQuebec Street 128th Ave 132th AveThor-2001-33

2 4Add through lane(s) CollectorMcKay Road 104th Ave. 103rd Ave.Thor-2006-11

4 6Add through lane(s) Principal104th Ave Marion St Colorado BlvdThor-2006-20

2 4Add through lane(s) MinorWestminster Blvd. US-36 103rd Ave.West-2006-01

2 0Remove component RampI-225: Colfax E side I-225 SB Colfax AveAura-2002-13 2003-071

2 0Remove component RampI-225: Colfax W side Colfax Ave I-225 NBAura-2002-13 2003-071

8 8Remove Component FreewayUS-6 Bryant StCDT6-2007-25 2007-171

2 0Remove component RampI-225: Colfax E side I-225 SB Colfax AveMV20-2020-223

2 0Remove component RampI-225: Colfax W side Colfax Ave I-225 NBMV20-2020-223

Rapid Transit Rapid TransitCentral Corridor Extens Downing 38th St/Blake StFsTr-2003-01

Page 29 of 39May 28, 2009


Through Lanes




0 0park-n-Ride Park-N-RideI-25 136th AvenueFsTr-2003-06

0 0park-n-Ride Park-N-RideI-25 Wagon RoadFsTr-2003-06

0 0park-n-Ride Park-N-RideI-25 ThorntonFsTr-2003-06

0 0park-n-Ride Park-N-RideI-76 Bromley RoadFsTr-2003-06

0 0park-n-Ride Park-N-RideUS-85 BrightonFsTr-2003-06

Rapid Transit Rapid TransitEnhanced Bus/Rail Ser RegionalFsTr-2003-17

park-n-Ride Park-N-RideUS-36 Corridor Commu 1st /Terry StRTD -2005-04 2007-050

park-n-Ride Park-N-RideGold Line LRT 38th Ave/44th Ave at InRTD -2005-08 2007-054

park-n-Ride Park-N-RideNorth Metro Rail 162nd AveRTD -2005-09 2007-055

Page 30 of 39May 28, 2009


Through Lanes




2 6Add through lane(s) PrincipalArapahoe Road Waco St Himalaya StApCo-2000-01

4 6Add through lane(s) PrincipalBroncos Pkwy Jordan Rd Parker RdApCo-2007-04

2 4Add through lane(s) Major RegionalUS-85 Daniels Park Castlegate PkwyCDT1-2001-02 2001-154

5 7Interchange Reconstruction PrincipalAlameda Ave Lipan St Santa Fe DrCDT6-2007-02 2007-158

8 8Interchange Reconstruction FreewayI-25 Alameda AveCDT6-2007-02 2007-158

8 8Interchange Reconstruction FreewayI-25 Santa Fe DrCDT6-2007-02 2007-158

4 6Add through lane(s) PrincipalTower Road 38th Ave. 48th AveDenv-2001-16

4 6Add through lane(s) PrincipalBroadway Arizona Ave Mississippi AveDenv-2005-24

2 4Add through lane(s) PrincipalCounty Line Road Phillips St University BlvdDgCo-2004-11

2 4New Road PrincipalChambers Rd. Stroh Rd. Hess Road.DgCo-2006-03

0 2New Road PrincipalChambers Rd. Stroh Rd. Hess RoadDgCo-2006-03

2 4Add through lane(s) PrincipalCanyons Pkwy (Arterial Crowfoot Valley Rd Hess RdDgCo-2008-01

2 4Add through lane(s) Minor9th Avenue Alpine St East County Line RdLong-2005-02

2 4Add through lane(s) PrincipalBayou Gulch/Chamber Parker Road Pradera PkwyMV20-2020-043

2 4Add through lane(s) PrincipalBayou Gulch/Chamber Pradera Pkwy Southern Boundary of MV20-2020-043

0 1Add Ramp(s) Ramp48th Ave 48th Ave E-470 NBMV30-2030-025

0 1Add Ramp(s) Ramp48th Ave 48th Ave E-470 SBMV30-2030-025

4 4New Interchange FreewayE-470 48th AveMV30-2030-025

0 1Add Ramp(s) RampE-470 E-470 SB 48th AveMV30-2030-025

0 1Add Ramp(s) RampE-470 E-470 NB 48th AveMV30-2030-025

Page 31 of 39May 28, 2009


Through Lanes




2 4Add through lane(s) PrincipalSH-119 Black Hawk proposed Black Hawk MV30-2030-111

2 4New Interchange PrincipalSH-119 Black Hawk TunnelMV30-2030-111

4 6Add through lane(s) PrincipalArapahoe Road Himalaya St Liverpool StMV30-2030-131

0 6New Road PrincipalPicadilly Road 68th Ave 80nd AveMV30-2030-146

0 4New Road Minor 6th Avenue Monaghan Rd Watkins RdMV30-2030-169

2 4Add through lane(s) PrincipalChambers Road Crowfoot Valley Road Stroh RoadPark-2008-09

2 4Add through lane(s) PrincipalChambers Road Southerly boundary To Crowfoot Valley RoadPark-2008-09

0 1Add Ramp(s) RampE-470 E-470 NB I-70 EBRTP -2001-228

0 1Add Ramp(s) RampE-470 E-470 SB I-70 EBRTP -2001-228

0 1Add Ramp(s) RampI-70 I-70 WB E-470 SBRTP -2001-228

0 1Add Ramp(s) RampI-70 I-70 WB E-470 NBRTP -2001-228

0 1Add Ramp(s) RampI-70 Ramp I-70 EB E-470 NBRTP -2001-228

4 6Add through lane(s) PrincipalSmoky Hill Road Pleasant Run Pkwy Versailles PkwyRTP -2001-82

2 4Add through lane(s) Principal104th Avenue McKay Road US-85Thor-1998-02

0 4New Road Minor112th Avenue Pierce/Main St Wadsworth PkwyWest-2006-03

Page 32 of 39May 28, 2009


Through Lanes




0 2Add HOT lanes Rapid TransitUS-36 I-25 Foothills ParkwayRTD -2005-05 2007-051

2 4Add through lane(s) PrincipalWashington Street 52nd Avenue 58th AvenueAdCo-1997-01

0 6New Road PrincipalMonaghan Rd Quincy Ave Yale AveApCo-2004-01

2 6Add through lane(s) PrincipalQuincy Ave Hayesmount Rd Watkins RdApCo-2007-08

4 6Add through lane(s) PrincipalQuincy Ave Monaghan Rd HayesmountApCo-2007-10

2 4Add through lane(s) MinorW. Coal Mine Road S. Sheridan Blvd. S. Platte Canyon Rd.ApCo-2008-01

4 4Interchange Reconstruction FreewayUS-36 Table Mesa DrBlCo-2007-03

2 4Add through lane(s) Major RegionalUS- 85 Louviers MP 191.75CDT1-2001-02 2001-154

2 4Add through lane(s) Major RegionalUS 285 Richmond Hill Road Kings Valley DriveCDT1-2004-11

0 1Add Ramp(s) RampUS 285 Pine Junction/CR 126 US 285 SBCDT1-2004-11

0 1Add Ramp(s) RampUS 285 US 285 SB Pine Junction/CR 126CDT1-2004-11

0 1Add Ramp(s) RampUS 285 US 285 NB Kings ValleyCDT1-2004-11

2 4Grade Separation Major RegionalUS 285 Pine Junction InterchanCDT1-2004-11

0 1Add Ramp(s) RampUS 285 US 285 SB Kings ValleyCDT1-2004-11

0 1Add Ramp(s) RampUS 285 US 285 NB Pine Junction/CR 126CDT1-2004-11

2 4Grade Separation Major RegionalUS 285 Kings Valley InterchanCDT1-2004-11

0 1Add Ramp(s) RampUS 285 Kings Valley US 285 SBCDT1-2004-11

2 4Add through lane(s) Major RegionalUS 285 Richmond Hill Road Kings Valley DriveCDT1-2004-11

0 1Add Ramp(s) RampUS285 Pine Junction/CR 126 US 285 NBCDT1-2004-11

0 1Add Ramp(s) RampUS285 Kings Valley US 285 NBCDT1-2004-11

Page 33 of 39May 28, 2009


Through Lanes




2 4Add through lane(s) Major RegionalUS 285 Park County Line Shaffers CrossingCDT1-2007-11

4 4New Interchange Major RegionalSH-119 SH-52CDT4-2001-07 2001-252

0 1Add Ramp(s) RampSH-119 SH-52 SH-119 NBCDT4-2001-07 2001-252

0 1Add Ramp(s) RampSH-119 SH-52 SH-119 SBCDT4-2001-07 2001-252

0 1Add Ramp(s) RampSH-119 SH-119 NB SH-52CDT4-2001-07 2001-252

0 1Add Ramp(s) RampSH-119 SH-119 SB SH-52CDT4-2001-07 2001-252

4 6Add through lane(s) FreewayI-225 North Ramps of Parker South Ramps of MissisCDT6-1998-04 1999-006

6 8Interchange Reconstruction RampI-25 I-25 NB 84th AveCDT6-2004-34

6 8Interchange Reconstruction RampI-25 84th Ave I-25 SBCDT6-2004-34

6 8Interchange Reconstruction RampI-25 84th Ave I-25 NBCDT6-2004-34

6 8Grade Separation FreewayI-25 84th AveCDT6-2004-34

6 8Interchange Reconstruction RampI-25 I-25 SB 84th AveCDT6-2004-34

4 6Add through lane(s) FreewayI-270 Vasquez Blvd I-70CDT6-2004-36

4 6Add through lane(s) FreewayI-270 Vasquez Blvd I-70CDT6-2004-36

2 4Add through lane(s) MinorColorado Blvd County Line Dry CreekCent-2007-02

0 0New Road FreewayPena Blvd Corridor I-70 TowerDenv-2006-22

2 4Add through lane(s) Principal 38th Ave Brighton Blvd Walnut StDenv-2007-13

2 4Add through lane(s) PrincipalPeoria Street E-470 .7 miles s/Lincoln AveDgCo-2003-001

0 4New Road PrincipalPeoria Street .75 mi S. Lincoln Ave MainstreetDgCo-2004-02

2 6Add through lane(s) PrincipalSH-83 SH-86 Bayou Gulch RdDgCo-2004-07

Page 34 of 39May 28, 2009


Through Lanes




2 4Add through lane(s) CollectorSinging Hills Rd Hilltop Rd Elbert County LineDgCo-2004-10

4 4New Interchange FreewayE-470 112th AvenueE470-2007-01

0 1Add Ramp(s) RampE-470 112th Ave E-470 SBE470-2007-01

0 1Add Ramp(s) RampE-470 E-470 SB 112th AveE470-2007-01

0 1Add Ramp(s) RampE-470 112th Ave E-470 NBE470-2007-01

0 1Add Ramp(s) RampE-470 E-470 NB 112th AveE470-2007-01

0 1Add Ramp(s) RampE-470 E-470 SB 88th AveE470-2007-02

0 1Add Ramp(s) RampE-470 88th Ave E-470 NBE470-2007-02

0 1Add Ramp(s) RampE-470 E-470 NB 88th AveE470-2007-02

4 4New Interchange FreewayE-470 88th AvenueE470-2007-02

0 1Add Ramp(s) RampE-470 88th Ave E-470 SBE470-2007-02

2 4Add through lane(s) PrincipalQuincy Avenue C-470 Simms StreetJfCo-2006-03

2 4Add through lane(s) Principal104th Avenue US-85 SH-2MV20-2020-005

2 4Add through lane(s) PrincipalSouth Boulder Road Lowell Blvd Sheridan PkwyMV20-2020-176

2 4New Road PrincipalThornton Pkwy Colorado Blvd Riverdale RoadMV20-2020-179

2 4Add through lane(s) PrincipalColorado Blvd SH-7 168th AveMV30-2030-033

2 6Add through lane(s) PrincipalGun Club Road Quincy Ave Yale AveMV30-2030-035

4 6Add through lane(s) FreewayE-470 I-70 Pena BlvdMV30-2030-097

2 4Add through lane(s) CollectorWatkins Rd Jewell Ave SH-36MV30-2030-170

Interchange Reconstruction FreewayI-70 Brighton Blvd York StMV30-2030-173

Page 35 of 39May 28, 2009


Through Lanes




6 8Interchange Reconstruction PrincipalArapahoe Road I-25 west ramps I-25 east rampsRTP -2001-72

4 6Interchange Reconstruction PrincipalSheridan Blvd US-36 south ramps US-36 north rampsRTP -2001-78

2 4Add through lane(s) MinorOld Wadsworth Blvd. 92nd Ave. Church Ranch BlvdWest-1995-18

Miscellaneous/Design FreewayI-70 Eisenhower Tunnel C-470CDT1-2004-07

park-n-Ride Park-N-RideGold Line LRT Ward RdRTD -2005-08 2007-054

park-n-Ride Park-N-RideGold Line LRT 38th Ave/44th Ave at InRTD -2005-08 2007-054

Page 36 of 39May 28, 2009


Through Lanes




2 4Add through lane(s) PrincipalSH-7 Riverdale Rd US-85AdCo-2004-07

2 4Add through lane(s) PrincipalSH-7 164th Ave Dahlia StAdCo-2004-07

2 6Add through lane(s) PrincipalWatkins Rd Quincy Ave I-70ApCo-2007-09

2 6Add through lane(s) PrincipalYale Ave Monaghan Rd Hayesmount RdApCo-2007-11

2 4Add through lane(s) MinorHudson Mile Rd Quincy Ave Yale AveApCo-2007-12

0 4New Road MinorHampden Ave Watkins Rd Monaghan RdApCo-2007-14

0 0Highway Operational Major RegionalFoothills Pkwy Iris Longmont DiagonalBlCo-2004-03

0 0Highway Operational Major RegionalIris Ave US-36 47thBlCo-2004-03

0 0Highway Operational Major RegionalLongmont Diagonal Foothills Pkwy Hoover RdBlCo-2004-03

0 2Add Ramp(s) RampPnR PnR US-36 NB/120th Ave/Brfd-1995-04

0 1Add Ramp(s) RampRamp 120th Avenue Wadsworth BlvdBrfd-1995-04

0 1Add Ramp(s) RampRamp Wadsworth Blvd SB US-36 WBBrfd-1995-04

0 1Add Ramp(s) RampRamp 120th Avenue US-36Brfd-1995-04

0 1Add Ramp(s) RampRamp 120th Ave US-36/Wadsworth BlvdBrfd-1995-04

0 2Add Ramp(s) RampRamp US-36/120th Ave/PnR Wadsworth BlvdBrfd-1995-04

0 2Add Ramp(s) RampRamp Wadsworth Blvd SB,W US-36 WBBrfd-1995-04

0 1Add Ramp(s) RampRamp Wadsworth Blvd NB US-36 WBBrfd-1995-04

0 1Add Ramp(s) RampRamp US-36 EB Wadsworth Blvd SBBrfd-1995-04

0 1Add Ramp(s) RampRamp Wadsworth Blvd SB US-36 EB/120th AveBrfd-1995-04

0 1Add Ramp(s) RampRamp Wadsworth Blvd SB 120th AveBrfd-1995-04

0 1Add Ramp(s) RampRamp Wadsworth Blvd SB US-36 EBBrfd-1995-04

Page 37 of 39May 28, 2009


Through Lanes




0 2Add Ramp(s) RampRamp 120th Ave/Wadsworth US-36 EBBrfd-1995-04

0 2Add Ramp(s) RampRamp US-36 EB Wadsworth BlvdBrfd-1995-04

0 1Add Ramp(s) RampRamp US-36 EB Wadsworth Blvd NBBrfd-1995-04

0 1Add Ramp(s) RampUS-36 US-36 NB 120th Ave/Wadsworth Brfd-1995-04

4 6Interchange Reconstruction Major RegionalWadsworth Blvd US-36 south ramps US-36 north rampsBrfd-1995-04

2 4Add through lane(s) Major RegionalUS- 85 Cook Ranch (MP 194.8 LouviersCDT1-2001-02 2001-154

3 4Add through lane(s) Major RegionalUS-285 Kings Valley Drive Shaffers CrossingCDT1-2004-11

2 4Add through lane(s) Major RegionalUS-285 Kings Valley Drive Shaffers CrossingCDT1-2004-11

6 8Add through lane(s) PrincipalArapahoe Road I-25 Potomac StCDT6-2004-31

6 8Add through lane(s) FreewayI-25 US-36 Thornton PkwyCDT6-2004-34

8 10Add through lane(s) FreewayI-70 I-270 Havana StCDT6-2004-40

0 4New Road Minor104th Ave E-470 Picadilly RdCoCy-2007-01

0 4New Road Minor112th Ave SH-2 Picadilly RdCoCy-2007-05

0 4New Road Minor 88th Ave Tower Rd Picadilly RdCoCy-2007-06

New RoadNew Minor Arterials an Regional RegionalDCOG-2005-25

New RoadNew Local (developer) Regional RegionalDCOG-2005-26

2 2Reclassified Minor168th Ave SH-7 Quebec StDCOG-2007-27

2 2Reclassified MinorHolly St 160th Ave 168th AveDCOG-2007-28



Page 38 of 39May 28, 2009


Through Lanes




2 2Reclassified Minor128th Ave Washington St Quebec StDCOG-2007-29

2 2Reclassified Minor136th Ave Colorado Blvd Quebec StDCOG-2007-30

2 4Add through lane(s) PrincipalSH-83 Russellville Rd SH-86DgCo-2004-06

4 6Add through lane(s) FreewayE-470 I-25 North I-76E470-2007-06

2 6Add through lane(s) Principal104th Avenue SH-2 E-470MV20-2020-006

4 6Add through lane(s) PrincipalHampden Avenue Colorado Boulevard I-25MV20-2020-073

5 6Add through lane(s) PrincipalHampden Avenue (SH- Dayton Street Havana StreetMV20-2020-074

2 4Add through lane(s) PrincipalMainstreet Tomahawk Rd Elbert County LineMV20-2020-111

6 8Interchange Reconstruction PrincipalSimms St US-6 south ramps US-6 north rampsMV30-2030-002

4 6Interchange Reconstruction PrincipalKipling Street US-6 south ramps US-6 north rampsMV30-2030-003

4 6Add through lane(s) Major RegionalWadsworth Parkway 92nd Avenue SH-128/ new 120th AvRTP -2001-12

6 8Add through lane(s) Major RegionalParker Road Quincy Avenue Hampden AvenueRTP -2001-27

4 6Interchange Reconstruction PrincipalKipling St I-70 south ramps I-70 north rampsRTP -2001-75

park-n-Ride Park-N-RideEast Corridor Commut Colorado BlvdRTD -2005-06 2007-052

park-n-Ride Park-N-RideI-25 SH-7RTD -2008-03

park-n-Ride Park-N-RideI-25 144th AveRTD -2008-04

Page 39 of 39May 28, 2009

67

APPENDIX B TRANSPORTATION MODEL CALIBRATION DESCRIPTION

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APPENDIX B TRANSPORTATION MODEL CALIBRATION DESCRIPTION

Introduction

In support of the conformity determination for the 2035 Regional Transportation Plan (RTP), the

Denver Regional Council of Governments‟ (DRCOG) Metro Vision Resource Center employed the

Regional Socio-economic Model together with Compass, the updated regional travel modeling

system. Compass is the product of the Refresh Phase of the Integrated Regional Model (IRM)

project, initiated in 2002, and completed in 2004. Recently, there were some minor adjustments,

and a second version was released in early 2007. Compass 2.0 includes some re-calibration of

the mode choice model to better match observed transit ridership for the 2005, and conversion to

the latest version of TransCAD, version 4.8.

In the mid-1990s, DRCOG, Regional Transportation District (RTD), Colorado Department of

Transportation (CDOT), and other regional planning partners decided to do a comprehensive

update of the Denver Regional Travel Model. The project participants realized the needs for

information were well beyond the capabilities of the then-current model. They also saw the

benefits of on-going research and enhancements of travel modeling theory and practice to enable

them to better address issues. As in most research fields, travel and land-use modeling was

advancing and the regional partners wanted to keep pace with these advances.

The first step in this effort was to conduct the Travel Behavior Inventory (TBI) project, to provide

more up-to-date and detailed data on which to base a new modeling system. The TBI project

involved multiple surveys of travel in the Denver metropolitan area, including:

The Household Survey – a travel diary survey that gathered complete travel information for

an assigned day for approximately 5,000 households;

The Front Range Travel Survey - a survey of vehicles entering and leaving the metropolitan

area;

The Commercial Vehicle Survey – a survey that gathered complete travel information from

more than 800 commercial vehicles on an assigned day; and

The Non-Respondent Populations Project - an effort to evaluate whether those who did not

respond to the survey exhibited different travel behavior than people who did respond to the

survey.

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The bulk of this survey work was conducted in 1997-1998, with data “cleaning” and summary

conducted through 2001. Immediately following the conclusion of the TBI project, the Integrated

Regional Model (IRM) project was initiated, and began using TBI data to build a new modeling

system for the region.

The IRM project is conducted in three phases. The first of these phases was the Refresh Phase,

which resulted in the development of the Compass travel model, as further described below. The

second phase, the Vision Phase, is also complete, and produced a “blueprint” for a next-

generation, activity-based travel and socio-economic modeling system. The third phase, the

Update Phase, is in its final stages and will implement the blueprint.

The Model Refresh Phase: Description and Elements

The overall goal of the IRM project was to completely re-build the regional modeling system,

incorporating advances in research and practice, so that the model could better address regional

planning issues. However, project participants felt that the needs of the regional planning process

were more immediate, and so conducted the Model Refresh Phase to develop such a set of early-

implementation improvements. Work on the Refresh Phase of the IRM project was completed in

2004, and included the following improvements:

Transfer of the regional model from the DOS-based MinUTP software package to the

Windows-based TransCAD software package. The model is now run on TransCAD version

4.8, an upgrade from version 4.7, on which the first Compass version was run. The most

significant consequence of this upgrade is the faster model processing time.

Conversion from the old 2,664 TAZ system to a new 2,800 Transportation Analysis Zone

(TAZ) system – Figure 1 shows the new TAZ system used with Compass. A geographic

information system version of this map may be found on DRCOG‟s website at

http://www.drcog.org/index.cfm?page=Maps.

A complete re-estimation of the trip generation model using the new TBI data.

A complete re-estimation of the trip distribution model using the new TBI data, including use

of a limited new set of k-factors to adjust gravity model outcomes to better match observed

travel patterns.

Update and simplification of the model element that assigns each TAZ to one of five area

types based on employment and population density.

http://www.drcog.org/index.cfm?page=M



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A complete re-development of the model element that predict parking costs for future years

in high-density areas such as the Denver central business district.

Numerous adjustments to the mode choice model to produce better bus and rail ridership

estimates, while maintaining consistency with federal modeling guidelines.

Use of observed speed data in trip distribution and highway assignment processes so that

the model now reproduces both observed volumes and observed speeds in the validation

year.

The improvements described above left the model‟s traditional four-step structure intact, but

resulted in significant improvements in the accuracy of the model‟s outcomes. All the primary

model elements, including the socio-economic model elements, are briefly described below, and

Figure 2 shows the flow of steps in the Compass model process.

Demographic Development Estimation

DRCOG works with a panel of economists and planners from both private and public sectors to

review current growth trends and evaluate the output of a regional forecast model. This model

relates the regional economy to national forecasts by industrial sector. Once employment levels

are predicted, a demographic model is used to determine the migration levels needed to generate

the labor force to fill the expected jobs. The forecasts are reviewed annually with major revisions

expected every five years.

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Figure 2 Socioeconomic Model Elements and Flow

Small Area Development Estimates

To provide development data at a level of detail necessary for the travel model, the regional urban

activity forecasts are disaggregated into 2,800 transportation analysis zones (TAZs). The

allocation to TAZs is carried out based on an attractiveness index for each TAZ, which in effect

develops a desirability “score” for each TAZ. This score is based on roughly 20 variables such as

miles of arterial roadway in the TAZ, rapid transit service, vacant land, local land use plans,

growth over the last decade, water/wastewater service, environmental constraints, and income

characteristics. Separate attractiveness indices and allocations are developed for commercial

and retail employment, and for households. The zones are filled with new development in the

given category starting with the TAZ with the highest attractiveness index. The amount of

Panel Review of Model Variables

DRCOG Draft Forecasts by TAZ (June/September 2004

Panel Review of Variable Weights for TAZ scoring

Community Review of Draft Forecasts

Regional Employment and Population forecast control totals

Utility Functions

Maximum allowable jobs and house-holds (capacity)

Allocate development to TAZs

Final 2030 Forecasts of employment and households

Socioeconomic Model

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development allocated to a TAZ is controlled by the amount of vacant land in the zone available

for residential or employment uses, the expected density in the zone, and other factors. The

model works its way through the list of zones until all of the growth is allocated. The effects of

several regional planning policies also are taken into account in the model: open space plans

affect the amount of developable land in the relevant TAZs; the regional urban growth boundary

affects expected densities, and the development totals in TAZs outside that boundary; and

planned urban centers affect the development capacity in the TAZs in which they are planned.

Figure 3 shows a flow diagram of the process of socioeconomic forecasting in the Denver region.

Highway and Transit System

The Denver Regional Travel Model includes a detailed description of the area‟s transportation

system. The highway network is represented by over 25,000 directional road segments,

described according to location, length, number of lanes, functional classification, and area type.

High-occupancy vehicle (HOV) lanes also are represented as special links. Tollway links are

assessed an additional impedance to reflect toll charges. The model also includes a fully detailed

representation of transit facilities, including all bus and rapid transit lines, park-n-Ride lots, bus

stops, and walk access/egress routes. Bus routes follow the same highway network as

automobiles trips, and bus speeds are based on auto speeds. Rail speeds are developed based

on transit schedule information. Capture areas for park-n-Ride lots are quite broad, permitting

trip-makers in the model to select the lot that produces the shortest overall transit path to their

destination. As part of the process of estimating highway and transit use, minimum impedance

paths are calculated using time, distance and toll cost over the highway and HOV system, and

time and cost over the transit system.

Trip Generation

Trip generation in the Denver Regional Travel Model is based on a “cross-classification” model

that makes use of the differences in trips per day made by different types of households. Smaller

households make fewer trips than larger households and lower income households make fewer

trips (especially work trips) than higher income households. Trip generation is conducted

separately for the following six trip purposes:

Home-Based Work: Trips between a worker‟s home and place of employment. These trips

are generated separately in three income groups.

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Home-Based Non-Work: Trips between home and any other destination for any non-work

purpose.

Non-Home Based: Trips that have neither end at home, regardless of purpose.

Commercial trips: Truck and other trips generated at places of business.

Internal/External Trips: Trips with one end inside the model area and one end outside.

External/External Trips: Trips with both ends outside the model area (i.e., trips passing

through the model area.)

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Figure 3

Travel Model Elements and Flow

Regional

Growth Totals

Small Area

Development

Estimates

Number

of Trips

Trip

Destination

Travel

Mode

Travel

Path

Highway

& Transit

System

Factors Considered

National Economic Forecasts

Industrial Base

Births/Deaths

In-Migration

Vacant Land

Past Growth

Water Supply

Roadways & Transit

Local Land Use Plans

Household Size

Income

Employment Type

Special Generators

Travel Time

Opportunities

Type of Trip

Income

Travel Time

Cost

Travel Time

Congestion

Cost

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The model includes relatively few special generator locations (i.e., locations at which trip

generation behavior is significantly different than the regional average.) Special generation is

performed for the Denver International Airport and for the Auraria Higher Education Campus.

Trip Distribution

The Denver Regional Travel Model uses a standard “gravity model” process to distribute all trips

except external-external trips. A gravity model assigns larger numbers of trips between large

zones (zones with a lot of development) that are close together, and fewer trips between smaller

zones (zones with a small amount of development) that are farther apart. Separate gravity models

were developed for each trip purpose, with distinct friction (calibration) factors for each. Separate

friction factors also were developed for work trips for each of the three income classes. In

addition, special „K‟ factors were applied to the Boulder urbanized area to account for the fact that

Boulder is somewhat more self-contained (i.e., both ends of a trip are somewhat more often in the

Boulder area) than the regional friction factors would otherwise suggest. K-factors also were

developed for a few other locations, to better match observed data in the base year,

compensating for insensitivities in the gravity model process. Also, special adjustments were

made for Denver International Airport trips, to better reflect the results of an air passenger survey

conducted in 1995. The most recent version of Compass includes an update of trip attraction

rates for DIA, to better match counted volumes on Peña Boulevard.

Mode Choice

Compass includes a mode choice component that estimates the number of trip-makers that will

select each available travel mode, given the travel conditions that each system user faces,

depicted in the model as described above in the section “Highway and Transit System.” Separate

mode choice models are used for each trip purpose, to take into account the fact that people use

different travel modes differently for different trip purposes. For example, people make different

use of transit for work trips than they do for shopping trips, as shopping involves transporting

purchased items that may be difficult to carry on transit vehicles. Internal work trips are estimated

using a multinomial logit model for the following modes:

Drive-alone;

Two-person carpool;

Three-plus person carpool;

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Transit via walk access; and

Transit via auto access.

For non-work trips, the choice is simply between auto and transit. All mode choice models take

into account trip time and cost.

The model also is calibrated to match observed trip data separately for four geographic sub-

markets in which trip-makers exhibit distinctly different behavior: the Denver central business

district, the City of Boulder, trips to Denver International Airport, and the remainder of the region.

Treating each of these areas separately ensures that the model does not match a region-wide

total of observed transit travel simply by making compensating errors in important areas of the

region. The most recent version of Compass includes a re-calibration of the DIA geographic sub-

market, so that mode choice outcomes better match counted volumes on Sky-Rider services.

Travel Time-of-Day

It is obvious to anyone who drives that congestion varies throughout the day, with some periods

highly congested, and others very little. To reflect this reality as faithfully as possible, the roadway

system depicted in the model includes estimates of the hourly capacity of different types of roads,

with freeways having the greatest capacity, and roads such as minor arterials having considerably

less. To model the variation of congestion through the day, the 24-hour automobile trips

produced by the mode choice model are divided into several time “slices,” based on TBI data

showing the start time of each trip. Subject to the limits imposed by the four-step modeling

process, the more such slices, the more accurate are the resulting congestion estimates. As the

level of detail of congestion forecasts required for both facility design projects and air quality

modeling in the Denver region demands a high degree of accuracy, Compass subdivides daily

trips into ten different periods of the day.

Network Assignment

Automobile trips are assigned to the highway network via a “user equilibrium” algorithm, after

commercial trips have been loaded first using an “all-or-nothing process.” The all or nothing

process simply assigns trips to the shortest path between origin and destination, ignoring possible

congestion effects that might cause trips to take different paths. The user equilibrium process

assigns the trips between each origin and each destination TAZ in such a way that, at the end of

the process, no trip can reduce its travel time by changing its path. In other words, taking into

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account the congestion produced by all other trips in the region, each trip is following its minimum

path. High-occupancy vehicles (HOV) are loaded simultaneously with single-occupant vehicles

(SOV). Transit assignment is performed separately, using an all-or-nothing algorithm that does

not take into account the possibility that high demand on some transit routes may motivate some

riders to shift routes. Finally, the model is run several times, feeding back the output speeds to

the input stages that require them as input (among them, the trip distribution stage) until the

output speeds and the input speeds match. The model also takes into account the effect of toll

costs in roadway route choice by converting toll costs into equivalent time cost using an estimated

value of time for automobile trip-makers. The most recent version of Compass includes

adjustments to the highway value of time, and to the approach to calculating generalized cost of

automobile operation, to improve the model‟s ability to match counted volumes on toll facilities,

particularly E-470.

Model Calibration

As part of the IRM Refresh Phase, an extensive model calibration and validation process was

undertaken, to ensure that the model was able to reproduce observed travel for the base year of

1997, and that it also was able to reproduce observed travel in a later year for which data was

available (2001). The model was calibrated to the 1997 data, as that was the year in which the

household travel data was collected, and validated for the year 2001. In the calibration process,

model parameters estimated using the TBI travel survey data are adjusted to match observed

transit and highway counts. Since the 2006 Cycle 2 Conformity Cycle, there has been some

small-scale recalibration of the transit model. In the validation process, this same model was run

for the year 2001, to assess its ability to successfully match observed data for another year. The

following data were used in the calibration and validation process:

Approximately 1,300 traffic counts (1997 and 2001 combined).

Total transit ridership for all bus and rail lines for both 1997 and 2001.

“Spot” transit ridership (at particular points on a given transit line) for approximately 12

screenlines.

Daily vehicle counts at all park-n-Ride lots in the region.

Address locations for all vehicles parked at the principal park-n-Ride lots on the Southwest

Corridor LRT line.

Trip purpose and origin-destination data for Southwest Corridor LRT line riders.

Speed observations taken at 114 locations in the region, during seven periods of the day.

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The traffic counts were used to compare modeled to observed roadway volumes across

screenlines (long lines drawn across the region to permit comparison of sub-regional traffic flow);

across cordon lines (circles drawn around key areas such as the CBD to permit comparison of

trips into and out of the area); and for total volume and vehicle miles of travel (VMT) subdivided by

facility type and area type.

Transit counts were used in a similar manner, especially to ensure the model‟s reasonable

reproduction of transit ridership by sub-model (such as rail versus bus). Speed data was used to

ensure that the model produced a reasonable approximation of speeds by facility type and area

type, at the same time as it was reproducing observed traffic volumes in those same categories.

Tables 1 and 2 show basic outcomes of vehicle miles of travel, compared to highway performance

monitoring system (HPMS) VMT estimates, and modeled speeds compared to observed speeds.

Note that the VMT totals in Table 2 reflect the fact that DRCOG has counts for only a subset of

roadway segments in the system, whereas the HPMS attempts to estimate VMT for all system

segments.

Appendix B Table 1 2001 Validation Year: Observed versus Modeled Average Speeds

Period Modeled (mph) Observed (mph)

AM Peak 39 37

Average Midday 47 50

Appendix B Table 2 2001 Validation Year: Observed versus Modeled Vehicle Miles of Travel

Modeled Observed Percent Difference

HPMS VMT 54.8 million 55.2 million -0.7%

VMT on links with counts in DRCOG database

19.4 million 18.6 million 4.3%

The following general conclusions may be drawn from these outcomes:

While speed outcomes are not perfect, the model quite closely matches observed speeds,

with the model being slightly faster than observations in the AM peak, and slightly slower

than observations in the Midday.

While it is typical that the model results fall somewhere between VMT totals implied by the

HPMS and by DRCOG „s counts, DRCOG has calibrated the model so that it “errs on the

high side;” that is to say, that it‟s apparent error is to overestimate the counted VMT, rather

than to underestimate the HPMS VMT to any significant extent. In this case, the balance

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point that DRCOG felt appropriate underestimates HPMS VMT slightly, but the

accompanying level of overestimation of counted VMT led DRCOG to the conclusion that

the final level of VMT was in fact conservative. In this way, DRCOG ensures that air quality

evaluation performed using the model is conservative (based on VMT that is more likely to

be overestimated than underestimated.)

Air Quality Modeling

Formal air pollutant emissions modeling is conducted by the APCD. However, DRCOG, the

APCD, and other agencies work closely together in this effort, both in developing the modeling

techniques, assumptions, and parameters, and in executing the model runs. Travel model results

are, of course, one of the principal inputs to the air pollutant emissions model. The model

produces estimates of the amount of emissions of carbon monoxide (CO), volatile organic

compounds (VOCs), oxides of nitrogen (NOx), and particulate matter (PM10) generated by motor

vehicles. The results are then combined with numerous assumptions concerning meteorology

and atmospheric chemical reactions to produce air pollutant concentration estimates.

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APPENDIX C

PM10 STREET EMISSIONS REDUCTION COMMITMENTS

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117

APPENDIX D U.S. DEPARTMENT OF TRANSPORTATION CONFORMITY FINDING

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(intentially blank)

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APPENDIX E LIST OF ACRONYMS

ACT Agency Coordination Team

APCD Air Pollution Control Division

AQCC Air Quality Control Commission

BNSFRR Burlington Northern Santa Fe Railroad

CAMP Continuous Air Monitoring Project

CDOT Colorado Department Of Transportation

CMAQ Congestion Mitigation Air Quality

CO Carbon Monoxide

DRCOG Denver Regional Council Of Governments

EPA United States Environmental Protection Agency

FHWA Federal Highway Administration

FTA Federal Transit Administration

HOT High-Occupancy Toll

HOV High-Occupancy Vehicle

MPO Metropolitan Planning Organization

MVRTP Metro Vision Regional Transportation Plan

NAAQS National Ambient Air Quality Standards

NO Nitrogen Oxide

PM Particulate Matter

Ppm Parts per Million

RAQC Regional Air Quality Council

RTD Regional Transportation District

RTP Regional Transportation Plan

SIP State Implementation Plan

TCM Transportation Control Measures

TDM Transportation Demand Management

TIP Transportation Improvement Program

TMA Transportation Management Area

TMO Transportation Management Organization

TSSIP Traffic Signal System Improvement Program

VOC Volatile Organic Compounds

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