CHARACTERISTICS Segment Description · US 12 - MP 432.62 TO MP 434.05 CHARACTERISTICS Segment...
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US 12 - MP 432.62 TO MP 434.05 CHARACTERISTICS Segment Description: This corridor segment begins at MP 432.62 at the Clarkston city limits and extends through Clarkston to Bridge Street at MP 434.05. County/Counties: Asotin Cities/Towns Included: This corridor runs through Clarkston. Number of lanes in the corridor: 2 to 4 Lane width: 12 to 12 feet. Speed limit: 30 to 30 mph. Median width: 0 to 0 feet. Shoulder width: 4 to 4 feet. Highway Characteristics: This urban-principal arterial is classed as both HSS and NHS. It a part of the Lewis and Clark Trail. It carries a T-3 freight designation carrying 3,070,000 tons annually. Special Use Lane Information (HOV, Bicycle, Climbing): There is a Two Way Left Turn Lane. Access Control Type(s): This section is a Class 5 Access Managed Highway. Terrain Characteristics: This section of US 12 is level terrain. Natural Features: This route accesses the Snake River system and Hells Canyon Wildlife Area by boat. Adjacent Land Description: The adjacent lands are predominately commercial as it passes through the City of Clarkston. Environmental Issues: There are no known environmental issues. Major Economic Issues: The economic impacts to modifying or upgrading this section of US 12 through Clarkston are many. This section of US 12 runs through a commercial district of the city. CA079 5/17/2007
Transcript of CHARACTERISTICS Segment Description · US 12 - MP 432.62 TO MP 434.05 CHARACTERISTICS Segment...
US 12 - MP 432.62 TO MP 434.05
CHARACTERISTICSSegment Description:This corridor segment begins at MP 432.62 at the Clarkston city limits and extends through Clarkston to Bridge Street at MP 434.05.
County/Counties: AsotinCities/Towns Included: This corridor runs through Clarkston.Number of lanes in the corridor: 2 to 4Lane width: 12 to 12 feet.Speed limit: 30 to 30 mph.Median width: 0 to 0 feet.Shoulder width: 4 to 4 feet.
Highway Characteristics:This urban-principal arterial is classed as both HSS and NHS. It a part of the Lewis and Clark Trail. It carries a T-3 freight designationcarrying 3,070,000 tons annually.
Special Use Lane Information (HOV, Bicycle, Climbing):There is a Two Way Left Turn Lane.
Access Control Type(s):This section is a Class 5 Access Managed Highway.
Terrain Characteristics:This section of US 12 is level terrain.
Natural Features:This route accesses the Snake River system and Hells Canyon Wildlife Area by boat.
Adjacent Land Description:The adjacent lands are predominately commercial as it passes through the City of Clarkston.
Environmental Issues:There are no known environmental issues.
Major Economic Issues:The economic impacts to modifying or upgrading this section of US 12 through Clarkston are many. This section of US 12 runsthrough a commercial district of the city.
CA079 5/17/2007
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CharacteristicsHSP Corridor Series
Milepost Marker
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U.S. Interstate
U.S. Highway
State Route
Local Roads
Railroad
Wetlands
Military Reservation
Tribal Lands
City Limits
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Usage
Solutions
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HSP CongestedCorridor Analysis
Characteristics
US 12 - MP 432.62 TO MP 434.05
ASSETSPavement:There are 4.29 lane miles of Hot Mix Asphalt on this segment of US 12. Signal:There are two signalized intersections at SRMP 433.14 and SRMP 433.81.
Structures:There are no structures identified.(Ramps, and locally owned structures (if any exist) are not identified in this section and may not be reflected on maps.)
Features Crossed:There are no features crossed.
ITS Facilities:There are no intelligent Transportation systems on this corridor.
Railroad Crossings:There are no at-grade rail crossings within this route segment.
Asset Other:None Identified.
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Corridor Location
AssetsSignalized Intersection
At Grade Railroad Crossings
Bridge
WeighStations
Rest Area Sites
Park and Ride
Ferry Terminal
Corridor Pavement TypeHMA
BST
PCCP
Other FeaturesU.S. Interstate
U.S. Highway
State Route
Local Roads
Ferry Route
Railroad
Military Reservation
Tribal Lands
City Limits
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AssetsHSP Corridor Series
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AssetsSignalized Intersection
At Grade Railroad Crossings
Bridge
WeighStations
Rest Area Sites
Ferry Terminal
Park and Ride
Corridor Pavement TypeHMA
BST
PCCP
Other FeaturesU.S. Interstate
U.S. Highway
State Route
Local Roads
Ferry Route
Railroad
Military Reservation
Tribal Lands
City Limits
Urban Area
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US 12 - MP 432.62 TO MP 434.05
USAGEGeneral Origin and Destination Travel Characteristics:This route is used primarily as a city street. Approximately 75 percent is local traffic using the route as a city street.
Snow/ice Issues:There are no sections within this corridor which present a problem for normal snow/ice control.
Annual Average Daily Traffic:Ranges from 7,000 to 20,000.
Significant Seasonal Average Annual Daily Traffic Changes:This section of US 12 has significant seasonal changes in traffic; RVs and other recreational passenger vehicles in spring/summerreturning to more local traffic in fall/winter with pass through trucks all year.
General Description of Major Average Annual Daily Traffic Locations:Annual average daily traffic is than 7,000 at jct. SR 128 at the west end of Clarkston to over 20,000 at the junction of SR 129.
Freight: Freight Classification: T3 Yearly Tonnage: 3.1M Truck Percentage of Annual Average Daily Traffic: 20%
Additional Usage Comments:There are no additional comments.
Average Annual Societal Cost of All Collisions: Approximately $2.07M
Collisions: Severe No of Collisions: 1 Less Severe No of Collisions: 56 List Data Years: 2003 to 2005
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07-09
07-0909
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HSP Corridor Series
Usage
HSP Corridor Location
Safety Analysis AreasPAL Spot 07-09
PAL Corridor 07-09
HAC 07-09
HAL Corridor 07-09
HAL Spot 07-09
Freight ClassificationT-1
T-2
T-3
Traffic Sections AADT< 3,000
3,001 - 10,000
10,001 - 20,000
20,001 - 40,000
40,001 - 80,000
80,001 - 100,000
100,001 - 120,000
> 120,000
Trucks 10% and Over
Other FeaturesU.S. Interstate
U.S. Highway
State Route
Local Roads
Railroad
Tribal Lands
Military Reservation
City Limits
Urban Area
County Line
Needs
Assets
Characteristics
Solutions
Usage
HSP CongestedCorridor Analysis
US 12 - MP 432.62 TO MP 434.05
NEEDS AND STRATEGIESPreservation
Pavement Condition and Needs:This section is hot mix asphalt (HMA) last paved in 1997. It is forecast to be re-surfaced in 2010.
Pavement Management Strategies:There are none identified.
Structures Condition and Needs:There are none identified. (This may include ramps and locally owned structures if any exist.)
Structures Management Strategies:There are none identified.
Additional Condition and Needs:There are none identified.
Additional Management Strategies:There are none identified.
ImprovementMobility Condition and Needs:This section of US 12 experiences traffic back-ups throughout the day beginning at 6:00 am.
Mobility Management Strategies:Adding general purpose lanes through this section will enable traffic to have a more free flowing movement.
Safety Condition and Needs:This section of US 12 experiences many rear-end type accidents due to slowing traffic caused by congestion and inattentivedrivers. Approximately 1/3 of all accidents in the corridor are rear-end.
Safety Management Strategies:Adding signals to this corridor with signal coordination will help to reduce rear-end type collisions.
Environmental Condition and Needs:There are none identified.
Environmental Management Strategies:There are none identified.
Restrictions:There are none identified.
50-Year Configuration:This corridor will continue to infill with mostly commercial type land uses over the next 50 years. This infilling will eventuallynecessitate moving this highway out of the downtown corridor to create a by-pass route around the city.
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NeedsHSP Corridor Series
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Bridge Replacement Priority
Replacement
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Painting
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2 Lane BW Narrow Bridge
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Posted Bridge
Vert. Clearance 15.5' Or Less
Fish Barriers
Require Repair
Little Gain
Undetermined
Unstable SlopeDebris Flow
Erosion
Landslide
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Paving DuePast Due
2005 - 2007
2008 - 2009
2010 - 2011
2012 - 2026
U.S. Interstate
U.S. Highway
State Route
Local Roads
Railroad
Military Reservation
Tribal Lands
City Limits
Urban Area
County Line
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HSP Congested CorridorSegment Analysis
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NeedsHSP Corridor Location
Bridge Replacement PriorityReplacement
Seismic
Special
Scour
Painting
Miscellaneous
Bridge Deck
Other Bridge Issues
2 Lane BW Narrow Bridge
Restricted Bridge
Posted Bridge
Vert. Clearance 15.5' Or Less
Fish Barriers
Require Repair
Little Gain
Undetermined
Unstable SlopeDebris Flow
Erosion
Landslide
Rockfall
Settlement
Paving DuePast Due
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2008 - 2009
2010 - 2011
2012 - 2026
U.S. Interstate
U.S. Highway
State Route
Local Roads
Railroad
Military Reservation
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US 12 - MP 432.62 TO MP 434.05
TIERED PROPOSED SOLUTIONSMinimum Fix
Description:This improvement project will upgrade intersections and install signals through the Clarkston area.
Delay Reduction: None identified.Collision Reduction: None identified.Deficient Concrete Lane Miles: None identified.Total Estimate Cost: $2.5 M
Cost Estimate Explanation:The estimate is based on upgrading three intersections and constructing signal systems at three more in the downtownClarkston.
Minimum Fix Benefits:This project will serve to maintain an acceptable level of service on the facility and to enhance safe operations in areas whereturning movements are creating congestion and delay. There are $8.8 million in safety benefits associated with this improvement.
Moderate FixDescription:This improvement project will upgrade intersections and install signals through the Clarkston area. It will also construct twogeneral purpose lanes through the corridor.
Delay Reduction: None identified.Collisions Reduction: None identified.Deficient Concrete Lane Miles: None identified. Total Estimate Cost: $10.4 M
Cost Estimate Explanation:The cost estimate is based on constructing general purpose lanes and improving and signalizing intersections.
Moderate Fix Benefits:This project will serve to maintain an acceptable level of service on the facility and to enhance safe operations in areas whereturning movements are creating congestion and delay. There are $ 3.2 million in general purpose lane benefits and $8.9 million insafety benefits associated with this project
Maximum FixDescription:This improvement project will construct a by-pass highway around the Clarkston/Lewiston downtown area. It will construct aninterchange at each end of the corridor and a new bridge crossing of the Snake River. This corridor will be approximately half ineach state (Washington and Idaho) so it is logically assumed that half of the project dollars would come from each of thosestates
Delays Reduction: None identified.Collisions Reduction: None identified.Deficient Concrete Lane Miles: None identified. Total Estimate Cost: $76.3 M
Cost Estimate Explanation:The estimate is based on the elements listed above.
Maximum Fix Benefits:This project will serve to reduce level of service problems by removing the roadway from the downtown and routing aroundexisting conflict points (intersections, road approaches, and commercial activities). There are $5.9 million in general purpose lanebenefits and $87 million in safety benefits associated with this project
US 12 - MP 432.62 TO MP 434.05
Collision Data Mart2004 Annual Traffic Report2005 State Highway Log2003-2022 Washington State Highway System PlanPavement Management SystemGeographic Information System
Data Sources and Contacts used:
None identified.
Additional Comments:
Funded Projects within Corridor LimitsTitleProject No
None identified.
Off-System Solutions:
None identified.
None identified.
Special Studies/Reports:
Start/Completion Date of Study: None identified.
None identified.
Required Studies
None identified.ExpectedResults
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U.S. Highway
State Route
Milepost Marker
Local Roads
Railroad
Tribal Lands
Military Reservation
City Limits
Urban Area
COUNTY
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