Find detailed reviews about specific areas of Washington’s transportation system in our collection of planning studies.
SR 302 is an important east-west link through Mason and Pierce Counties. The road is an important connection for Belfair and Purdy. It also provides a connection between SR 3 and SR 16 for residents, businesses and visitors.
The study looked at improvements to address roadway collapse
The City of Bremerton and WSDOT completed a comprehensive planning study of the SR 303 (Warren/Wheaton) corridor. Using the Practical Solutions approach, the study will look at the corridor from Burwell Street to NE Fairgrounds Road, particularly the segments within city limits. The study will
WSDOT is studying how people use SR 503 and how continued growth might affect future use. Focus areas include addressing gaps in active transportation (e.g., biking, walking and rolling) facilities, access to transit, vehicle traffic pain points, safety improvements and freight mobility planning
WSDOT routinely reviews rural area intersections on its state highway system to find ways to reduce potential crashes. As a result of this review, we will replace the existing stop signs at three intersections in Pierce County with single-lane roundabouts. These roundabouts fit within the
Each year, WSDOT looks at all rural stop-controlled intersections on our state highways to identify ways to reduce potential crashes. For some intersections, WSDOT develops a safety plan that outlines ways to manage travel speeds and reduce conflict points.
As a result of a recent safety
To reduce potential crashes, we complete routine reviews of rural area intersections on the state highway system. As a result of this review, we will construct a roundabout on SR 510 at the intersection of McAllister Court SE/Rockcress Drive SE and remove the existing stop signs. This roundabout
SR 512 is an important east-west link through Pierce County that connects the cities of Lakewood and Puyallup. This highway provides a vital connection between Interstate 5 and SR 167 for residents, businesses and visitors. The study identified potential multimodal system improvements and
SR 516 through Covington is a heavily traveled road that serves as the community's main commercial route. As the area grows, the demand on the roadway is expected to increase. WSDOT is working with the city of Covington to consider multimodal access, safety, environmental and performance
Through this study, we determined priorities for future highway work or transit service adjustments. and developed practical, cost-effective concepts to help improve trip reliability and safety along the corridor. Our study partners included Burien, Des Moines, SeaTac, Tukwila, tribes, King
State Route 532 is the primary east-west corridor to Interstate 5 for the city of Stanwood, Camano Island and unincorporated areas of Snohomish County. Over the last several years, this area has experienced increased levels of vehicular and commercial truck traffic during peak travel periods. In
State Route 542, Mount Baker Highway, connects communities in eastern Whatcom County with the rest of Washington State while also providing a gateway to outdoor recreation and tourism opportunities near Mount Baker. This route also acts as an economic corridor transporting over 3 million tons of
WSDOT is replacing the existing two-way stop at the intersection of State Route 702 and 8th Avenue South with a modern roundabout. The intersection currently has stop control on the northbound and southbound legs, and a span wire mounted, four-head flashing beacon. This project will remove the
State Route 900/Martin Luther King Jr. Way South in Skyway is a heavily-traveled commuter corridor with approximately 32,000 vehicles using this section each day. However, it lacks complete sidewalks for pedestrian connectivity between residences and community hubs. We are conducting a corridor
State Route 99 (Evergreen Way) in unincorporated Snohomish County is a heavily traveled corridor that serves as a major north-south alternative to I-5, and links Lynnwood, Everett and other growing communities in Snohomish County. The area lacks sidewalks and other pedestrian and transit safety
This planning study is intended to improve the overall connectivity and mobility in the study area, increase safety by reducing potential conflicts between modes and to enhance economic vitality opportunities supported by the previously mentioned goals.
The Tacoma to Puyallup Regional Trail will connect downtown Puyallup to Fife and downtown Tacoma, providing people who live and work in the area with a new option to travel without a motorized vehicle to a variety of destinations. Through this study, WSDOT will complete preliminary trail design
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 financial
WSDOT is studying how high-speed ground rail might serve as a catalyst to transform the Pacific Northwest. A stronger, better connected economic megaregion — stretching from greater Vancouver, British Columbia to metro Seattle, Washington to Portland, Oregon — has the potential to thrive in the
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
The Town of Naches, the Yakima Valley Conference of Governments (YVCOG) and the Washington State Department of Transportation (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,
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 reduce
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
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
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
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 interchange