NCHRP PROJECT 03-110: ESTIMATING THE LIFE-CYCLE COST OF INTERSECTION DESIGNS Kittelson & Associates,...

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Welcome and Introductions  Project Team  Kittelson & Associates, Inc. Lee Rodegerdts, P.E., Principal Investigator Team: Wayne Kittelson, David Reinke, Joe Bessman, Matt Kittelson & Julia Knudsen  ECONorthwest Carl Batten and Mike Wilkerson  Write Rhetoric – Technical Editing Danica Rhoades

Transcript of NCHRP PROJECT 03-110: ESTIMATING THE LIFE-CYCLE COST OF INTERSECTION DESIGNS Kittelson & Associates,...

NCHRP PROJECT : ESTIMATING THE LIFE-CYCLE COST OF INTERSECTION DESIGNS Kittelson & Associates, Inc. NCHRP Project Welcome and Introductions Project Objective and Overview Research Approach Life-Cycle Cost Estimating Tool Case Studies Conclusions Welcome and Introductions Project Team Kittelson & Associates, Inc. Lee Rodegerdts, P.E., Principal Investigator Team: Wayne Kittelson, David Reinke, Joe Bessman, Matt Kittelson & Julia Knudsen ECONorthwest Carl Batten and Mike Wilkerson Write Rhetoric Technical Editing Danica Rhoades Welcome and Introductions NCHRP Staff and Panel Rick Collins Panel Chair Gilbert Chlewicki Matthew Enders Jason Firman William Lambert John Powell Edward James Smaglik Jin Wang Richard Cunard, TRB Hilary Isebrands, FHWA Ray Derr, NCHRP staff 4 NCHRP Project Welcome and Introductions Project Objective and Overview Research Approach Life-Cycle Cost Estimating Tool Case Studies Conclusions NCHRP Project : Project Objective Develop a spreadsheet-based tool for comparing life-cycle costs of alternative designs for new and existing intersections Demonstrate the application of the tool to range of options: Stop-controlled Traffic signal Roundabout Innovative designs NCHRP Project : Project Overview Task 1: Methodology Task 2: Identification of Costs Task 3: Data Sources Task 4: Mockup of Interface and Outputs Task 5: Validation Plan Task 6: Interim Report and NCHRP Panel Meeting Task 7: Prepare the Tool Task 8: Case Studies Task 9: Final Report Task 10: Webinar Budget: $300,000 Schedule: May 2013 June 2015 NCHRP Project Welcome and Introductions Project Objective and Overview Research Approach Life-Cycle Cost Estimating Tool Case Studies Conclusions Research Approach Life-Cycle Costs in Practice Addressing Different Lifespans Addressing Varying Spatial Scopes Addressing New Types of Intersections Costs Life-Cycle Costs in Practice Current intersection evaluation practices vary widely by jurisdiction. Nearly all agencies consider the upfront initial capital improvement costs. Operation and maintenance costs are difficult for agencies to quantify. Some agencies consider the societal costs of crashes in evaluating alternatives, though these costs are typically used as informative values. Overall a desire to better compare life-cycle costs but no clear direction or established procedure. Research Approach Life-Cycle Costs in Practice Addressing Different Lifespans Addressing Varying Spatial Scopes Addressing New Types of Intersections Costs Addressing Different Lifespans - Overview Purpose of LCCET is to develop a tool that is applicable to a wide variety of intersection forms and in a wide variety of applications. Planning horizon of most agencies is between 15 and 25 years. Intersections in the urban fringe today may be fully urbanized within the planning horizon. Intersections in built urban environments may be in place 50 years. Intersections may exceed their useful life due to increasing traffic, changing user types, or changes to the transportation network. Components of an intersection may have individual lifespans that vary from the intersection lifespan. Addressing Different Lifespans - Overview Analyst should be provided guidance to help identify the forecasting information available, and consider the factors that would make the intersection functionally or operationally obsolete. Common analysis life cycle is likely to range between 20 and 40 years. The LCCET treats life cycle as a variable to provide flexibility to adapt to the intersection and analysis context and analysis needs. Considers terminal and salvage values, when analysis period is shorter than the useful intersection life. Addressing Different Lifespans - Methodology Net Present Value (NPV) = PV Benefits PV Costs + PV Salvage Value Research Approach Life-Cycle Costs in Practice Addressing Different Lifespans Addressing Varying Spatial Scopes Addressing New Types of Intersections Costs Addressing Varying Spatial Scopes Identify the spatial and geometric layout of each alternative. Identify influence limits for each of the concepts. Back of queue Start of deceleration Overlay these influence limits, and establish a cordon line based on the most distant influence limit of the alternatives being considered. Record performance metrics for all vehicles from the time they enter to the time they exit this cordon limit for each of the concepts. Addressing Varying Spatial Scopes Unsaturated Conditions Addressing Varying Spatial Scopes Unsaturated Conditions Addressing Varying Spatial Scopes Unsaturated Conditions Addressing Varying Spatial Scopes Oversaturated Conditions Cordon line must encompass network area where queuing exists or traffic volume/pattern changes occur. Microsimulation may be required. Separate consideration of Cordon Area and Modeling Area. System and Context Considerations Consider the area beyond the study intersection (e.g. land use, signal coordination, nearby failing intersections, etc.) Research Approach Life-Cycle Costs in Practice Addressing Different Lifespans Addressing Varying Spatial Scopes Addressing New Types of Intersections Costs Addressing New Intersection Types Use of the cordon methodology allows the LCCET to address new intersection types Assumes that all significant differences among alternatives are captured within the cordon and can be estimated within the cordon Life-cycle costs for new intersection types may be constrained by available capital and maintenance cost estimates or crash predictions Research Approach Life-Cycle Costs in Practice Addressing Different Lifespans Addressing Varying Spatial Scopes Addressing New Types of Intersections Costs Costs Reductions in user and non-user costs are considered to be benefits and go in the numerator of the benefit-cost ratio User Costs Include construction-related user costs (e.g., delay) Intersection-related user delay costs Reliability of travel time Safety User operating costs Non-User Costs Emissions Non-user delay, public safety, business impacts Costs Agency costs Agency costs should be familiar and relatively easy for agencies to estimate Unit costs may vary considerably between regions. We supply defaults based on national averages, but agencies likely may want to override. Guidance is focused on definitions and what to include/exclude Costs User and non-user costs Agencies likely have less experience and confidence in estimating these costs The LCCET provides default values and guidance for developing locally-appropriate values of time, etc. Our guidance is consistent with FHWA guidance for TIGER grants and TIFIA financing. For many intersections, some categories of user and non-user costs produce trivial differences between alternatives. NCHRP Project Welcome and Introductions Project Objective and Overview Research Approach Life-Cycle Cost Estimating Tool Case Studies Conclusions Life-Cycle Cost Estimating Tool Overview Information Worksheets Parameter Worksheets Alternatives LCCET Outputs Appendix Auxiliary Worksheets LCCET Overview Converts units of various metrics into Net Present Value Provides the user with national average values for various costs while allowing calibration Provides summary in spreadsheet form LCCET Overview - Worksheets Worksheet namePurpose Introduction Introduction and overview to LCCET List of worksheets and their functions Organization Information Agency information Project information Cost Parameters Discount rate for B-C analysis Unit costs: value of time, cost of crashes, etc. GHG.Costs Discounted unit costs of greenhouse gas emissions Demand Parameters Demands and vehicle occupancies for opening year, end year, and any interim years Alternatives_MasterList Master list of all alternatives, with brief descriptions Allows user to add or delete alternatives BaseCase Cost information for base case: i.e., the reference alternative Alternative_1 n Cost information for alternatives 1 to n Outputs Tabular and graphical summary of results Auxiliary worksheets Sheets with supplementary information for running the LCCET program code. Life-Cycle Cost Estimating Tool Overview Information Worksheets Parameter Worksheets Alternatives LCCET Outputs Appendix Auxiliary Worksheets Information Worksheets Introduction Worksheet An overall guide to the LCCET A legend to show the color scheme used in the LCCET List of the worksheets in the LCCET Organization Information Worksheet Used for reference purposes only Life-Cycle Cost Estimating Tool Overview Information Worksheets Parameter Worksheets Alternatives LCCET Outputs Appendix Auxiliary Worksheets Parameter Worksheets Cost Parameter Worksheet Base year for discounting All costs in the LCCET is discounted to this year. Discount rate The discount rate is the interest rate that is used to discount all costs to present value. varies between 3% and 4% Parameter Worksheets Cost Parameter Worksheet Value of time The value of time represents the average tradeoff that travelers are willing to make between travel time and costs. Default value is set to the national average Crashes The user may choose among several categories for defining crash costs. Parameters Worksheets Cost Parameters Worksheet Greenhouse gases These are the unit costs of greenhouse gas emissions in dollars per metric ton of CO 2 equivalent emissions. Greenhouse gas costs are contained in a separate worksheet Criteria pollutant costs The unit costs of criteria pollutants may be provided by the main pollutant types, or the user may also define the categories to be used. Parameters Worksheets Demand Parameters Worksheet Provides for the input of total intersection traffic demand Demands are broken down by hour of the year to allow calculation of hour-by-hour average travel times (or delays) through the intersection All values