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Find detailed reviews about specific areas of Washington’s transportation system in our collection of planning studies.

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      67 results

      US 12 Naches Active Transportation Corridor Study

      Location: US 12
      Timeline: Fall 2022 - Winter 2024
      • Complete
      • Yakima County

      The Town of Naches, the Yakima Valley Conference of Governments (YVCOG) and WSDOT are working together to provide a safe, reliable and effective transportation network for drivers, cyclists and pedestrians along the US 12 corridor in Naches, Washington.

      The study area included the US 12

      US 12/Old Highway 9 Roundabout Pre-design Study

      Location: US 12
      Timeline: January - June 2025
      • In progress

      WSDOT reviews intersections on the state highway system for safety. We look for the locations with the highest risk for severe crashes. That process identified the US 12/Old Highway 9 intersection for safety improvements. The recommendation is a single-lane roundabout. The pre-design process

      US 195 Corridor Crash Analysis

      Location: US 195
      Timeline: January 2010 - January 2016
      • Complete
      • Spokane County
      • Whitman County

      The US 195 Corridor Crash Analysis is a traffic safety study that focuses on:

      • Identifying the most common circumstances or trends that contribute to serious and fatal injury crashes along the corridor.
      • Identifying low-cost solutions or countermeasures most likely to

      US 195 North/I-90 Transportation Study

      Location:
      Timeline: Spring 2018 - Ongoing
      • In progress

      Create a more resilient and connected network for local trips between Hatch Road and I 90.

      Improve safety for all and preserve capacity on US 195 for regional trips.

      Extend the life of the US 195/I-90 interchange.

      Provide more connections for walking, biking, and using

      US 2 - SR 204 - 20th Street SE Interchange Justification Report

      Location: US 2, SR 204
      Timeline: 2016 - 2019
      • Complete
      • Snohomish County

      The population of Snohomish County has more than doubled since 1980 and is expected to gain another 200,000 residents by 2035. This growth will add pressure to the county’s high-traffic routes, including the US 2, SR 204 and 20th Street Southeast interchange, which already experiences severe

      US 2 Westbound Trestle Study

      Location: US 2
      Timeline: 2019 - 2021
      • Complete
      • Snohomish County

      The study helps identify transportation issues, environmental concerns, community values and economic goals early in project planning. A detailed environmental review process follows a PEL study, as required by the national and state environmental policy acts. Information gathered in the PEL

      West Plains Subarea Transportation Management Plan Study, Phase 1, US 2 Vicinity

      Location: US 2
      Timeline: Fall 2019 - Ongoing study
      • In progress
      • Spokane County

      The US 2 West Plains Sub-area Management Plan Phase 1, refines previous studies that have been completed in the West Plains area. This "live" study addresses the mobility gaps (congestion) that have already been identified along this 8-mile, east-west corridor between the US 2/ I-90

      Slow down – lives are on the line.

      Excessive speed was a top cause of work zone collisions in 2024.

      Phone down, eyes up.

      Work zones need our undivided attention.

      It's in EVERYONE’S best interest.

      96% of people hurt in work zones are drivers, their passengers or passing pedestrians, not just our road crews.