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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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78 results
SR 165 Carbon River – Fairfax Bridge Planning Study
WSDOT initiated a study of the State Route 165 Carbon River/Fairfax Bridge over the Carbon River Canyon this spring following the closure of the 103-year-old bridge. The bridge was closed due to advanced deterioration in the steel supporting members of the bridge. In-person open houses were held
SR 167 Implementation Plan
Aligned with the SR 167 Master Plan Planning and Environmental Study, the purpose of the
SR 167 Master Plan
The Puget Sound region is thriving and attracting large population and employment growth. This growth increases strain on our transportation infrastructure and services, resulting in increased traffic congestion and increased needs for maintenance and preservation. There is a need to move people
SR 20 - Discovery Road & Kearney Street Intersection Roundabouts Pre-Design Study
The SR 20 Discovery Road and Kearney Street Intersection Roundabouts Pre-Design Study is complete and the report is now available for viewing. The pre-design study looked at the signalized intersections on SR 20 at Discovery Road and Kearney Street. The study examined replacing the
SR 20 Skagit O'Brian Reach Feasibility Study
The SR 20 Skagit River O’Brian Reach Feasibility Study area is located along SR 20 near Rockport at milepost 101. This section of SR 20 experiences frequent embankment erosion and flooding and has required repeated emergency repairs following floods in the Skagit River. The purpose of the study
SR 202 - E Lake Sammamish Parkway to 244th Ave NE - Corridor Planning Study
State Route 202 is an important east-west link for King County communities like Woodinville, Redmond, Sammamish, Fall City and North Bend. Thanks to growth and development, traffic on SR 202 has increased in the last decade, contributing to longer travel times for commuters and freight.
SR 202 Corridor Studies
We are conducting two corridor studies along SR 202. One study will focus on safety concerns between 244th Ave. NE to 324th Ave. SE, and the second study will cover community needs between 324 Ave. SE and SR 203 in Fall City.
Both studies will document strategies to improve
SR 3 and Division Avenue Roundabout Pre-design Study
This pre-design sought feedback on a roundabout at the SR 3 and Division Avenue and West Pleasant Street intersection.
In June and July 2025, WSDOT met with local agencies. In August 2025, WSDOT conducted an online open house. The goal of these meetings was to make sure the project meets
SR 3 Gorst Area Planning and Environmental Linkages Study
In June 2024, WSDOT began a Planning and Environmental Linkages (PEL) study to look at State Routes (SR) 3, 16, 166 and 304 in the Gorst area. This study evaluates a range of alternatives that improve transportation for all roadway users.
Key study partners, including tribes, state, local
SR 3 Mason Lake Road Roundabout Pre-design
This pre-design sought feedback on a roundabout at the SR 3 and Mason Lake Road intersection.
In March and 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 the roundabout.
SR 3 Roundabouts Pre-Design Study
WSDOT routinely reviews rural intersections on the state highway system to find ways to reduce potential crashes. We look for locations that are at the highest risk for severe crashes.
This project will construct single-lane roundabouts on East Agate Road and East Pickering Road in Mason
SR 3/Craig Road to Arcadia Road Pre-design
WSDOT routinely reviews the state highway system. We look for locations that are at the highest risk for severe crashes and then explore ways to reduce the likelihood of crashes. As a result of the review, we plan to replace the existing intersections on SR 3 at Craig Road, Mill Creek Road, and
SR 302 Elgin Clifton Road to SR 16 Corridor Study
SR 302, an important east-west link for Key Peninsula communities, has been the subject of a corridor study designed to conform with the decision making requirements of the National Environmental Policy Act (NEPA). This area of the state's highway system located in Pierce and Kitsap counties has
SR 302 Roundabout Pre-design Study
Information about the study, the recommended roundabout and feedback WSDOT received during the online open house are now available for
SR 302 Victor Area Corridor Study
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 sloughing and
SR 302/Goodrich Drive Pre-design
WSDOT evaluates the crash history on all roads in the state. This helps WSDOT find locations in need of improvements. This corridor has a history of fatal and serious injury crashes, so it needs improvements
SR 303 Corridor Study
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
SR 305 High School Road Pre-design
WSDOT periodically evaluates the crash history at all intersections in the state. This helps WSDOT find intersections most in need of improvements. The SR 305 and High School Road intersection’s history of fatal and serious injury collisions placed it on WSDOT’s safety priority programming.
SR 500 NE Fourth Plain Blvd to NE 76th Street – Complete Streets Pre-design Study
State Route 500 (SR 500) from Northeast Fourth Plain Boulevard to Northeast 76th Street in Vancouver and unincorporated Clark County needs repairs to its pavement. This work is necessary to keep the road in good condition and protect the public's investment in it. A review called the Complete
SR 503 Corridor Plan: Vancouver to Battle Ground
WSDOT is studied how people use SR 503 and how continued growth might affect future use. Focus areas included 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
SR 507 Active Transportation and Community Engagement Plan
Working with local agency partners, Tribal partners and the community, this study will identify ways to improve safety, traffic flow and access to homes, businesses and other destinations within the study area. This study will also look for ways to improve travel for people who walk, bike, take
SR 507 and SR 702 Roundabouts Pre-design Study
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
SR 507 Roundabout Pre-design Study
Each year, WSDOT looks at all rural stop-controlled intersections on our state highways to identify ways to reduce potential crashes. For some intersections, we develop a safety plan that outlines ways to manage travel speeds and reduce conflict points.
The proposed single-lane roundabout
SR 510 at McAllister/Rockcress Roundabout Pre-design Study
To reduce potential crashes, we routinely reviews of rural area intersections on the state highway system. As a result of this review, a roundabout is planned on SR 510 at the intersection of McAllister Court SE/Rockcress Drive SE and remove the existing stop signs. This roundabout will fit
SR 512 Corridor Study
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 - Covington Targeted Study
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 worked with the city of Covington to consider intersection control options for the five intersections along with
SR 518 Corridor Planning Study
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
SR 532 Existing Conditions Analysis - Completed Spring 2024
SR 532 is the primary east-west corridor to I-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 addition, the
SR 7 Pre-design – 267th Street East to SR 507
WSDOT has an upcoming safety improvement project on State Route 7 between SR 507 and 267th Street. The project will also repave the roadway. This pre-design identified
SR 7/ SR 507 to 99th St S - Corridor Improvements - Pre-design
This section of State Route 7 between SR 507 and 99th Street South is part of a WSDOT preservation project. The Preservation Program helps keep roads safe and in good condition. This part of SR 7 needs to be repaved. Repaving helps protect the roadway and helps reduce the potential for more
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