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Find detailed reviews about specific areas of Washington’s transportation system in our collection of planning studies.
You might be looking for projects or local projects
74 results
Tacoma to Puyallup Regional Trail
The spuyaləpabš Trail, formerly referred to as the Tacoma to Puyallup Regional Trail, will be a 12-mile regional shared use path that connects downtown Puyallup to Fife and downtown Tacoma. It will provide people who live and work in the area with a new option to travel without a motorized
Tolling the SR 509 and SR 167 expressways
At the request of the Washington State Legislature, WSDOT prepared toll feasibility studies for SR 167 and SR 509 to examine tolling and construction options for the new SR 167 and SR 509 corridors. The studies provided insights into:
- Potential funding and corresponding
Transportation Resilience Improvement Plan (TRIP) study
The TRIP will help state decision-makers prioritize immediate and long-term investments to address climate and natural hazards such as flooding, wildfire, landslides and earthquakes. These hazards could disrupt transportation networks and make it difficult for our communities to get services
US 101 East Sequim Pre-Design Study
US 101 connects Sequim, a city in Clallam County, with the rest of western Washington. It is a vital link for residents, businesses and visitors. The pre-design study identified roadway improvements focused on safety, access and improving travel times using the
US 101 N of E Humptulips Rd to W of Boulder Creek – Paving Pre-design
This project will repave US 101 in two sections in Grays Harbor County. One paving segment is in Humptulips. The second spans Neilton and Amanda Park. The project will also add pedestrian and bicycle facilities and sign updates.
US 101 is the only state highway in this area. It is home to
US 101 Paving Pre-design Study
Two segments of US 101 are scheduled to be repaved. Segment one is near Port Angeles from East Kolonels Way to Shore Road. Segment two spans Carlsborg and Sequim from Kitchen-Dick Road to Simdars Road.
This pre-design study completed a
US 101 Raymond Corridor Management Plan Study
Emergent Needs funds were used for this study. The study documents community feedback related to challenges when crossing the highway, including concerns about driver yielding behavior at crosswalks. The City of Raymond requested that WSDOT evaluate potential improvements on US 101. This
US 12 Naches Active Transportation Corridor Study
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
This pre-design sought feedback on a roundabout concept for the intersection of US 12 and Old Highway 9 in southwest Thurston County.
In April 2025, WSDOT met with local agencies. In May 2025, WSDOT conducted an online open house. The purpose of this engagement was to gather feedback about
US 195 Corridor Crash Analysis
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
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
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 - West Plains Subarea Transportation Management Plan Study
The US 2 West Plains Sub-area Management Plan Phase 1, refines previous studies that have been previously 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
US 2 Westbound Trestle Study
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
1,557 work zone-related crashes
were recorded on state highways in 2025.
542 people were injured
in 2025 due to work zone-related crashes.
29% increase in fatality collisions
in work zones from 2024 to 2025.