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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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65 results

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

166,800 electric vehicle

registrations in Washington in 2023, up from 114,600 in 2022.

87 wetland compensation sites

actively monitored on 918 acres in 2023.

25,000 safe animal crossings

in the Snoqualmie Pass East Project area since 2014.