Find detailed reviews about specific areas of Washington’s transportation system in our collection of planning studies.
- Improve on-time performance.
- Support reliability of service and system.
- Provide adequate travel opportunities for key user groups.
- Maintain as much capacity as possible.
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In its 2022 session, the Legislature directed WSDOT to conduct a study about statewide transit service benchmarks. The initial report proposed a definition of frequent fixed-route transit and documented how many people in Washington live within a half-mile walk of frequent fixed-route transit
The Heritage Connectivity Trails (HCT) project creates over 150 miles of walking paths throughout the lower Yakima Valley on Yakama Nation land. This project is important to the area because this stretch of US 97 has a high pedestrian fatality rate in the state of Washington.
WSDOT is relocating the signal pole and utility cabinet at the intersection of Bridgeport Way and the I-5 northbound off and on ramps. The existing signal system requires frequent and extensive maintenance repairs. While planning for these improvements, the pre-design study conducted a complete
The Fort Lewis Weigh Station located along northbound Interstate 5 near DuPont in Pierce County is in need of updating. Freight traffic in the area experiences recurring congestion and delay due to high volumes from both freight and commuter traffic. The weigh station was built in 1969 and in
The Northwest Region Mount Baker Area is leading this effort to address several mobility challenges along segments of the I-5 corridor within the urban area of Bellingham (MP 250 to MP 258). Congestion occurs regularly during peak travel at the I-5 interchanges and on the connecting regional
The 9-mile stretch of I-5 between Mount Vernon and Burlington is the backbone of the transportation network in Skagit County, powering the economy, linking local businesses to regional markets and connecting people to jobs, goods and each other. To plan for future growth, address safety and
In Spring 2022 the Legislature initiated the Move Ahead Washington funding package to create planning and environmental linkages studies for Interstate 5. This work will ultimately create a master plan for the critical I-5 corridor that meets current and future transportation needs, and reflects
The "Planning and Environmental Linkages Study" (PEL study) built upon the goals and strategies outlined in the original 2020 Corridor Study. This PEL Study represents a collaborative and integrated approach to transportation decision-making that:
- Considers environmental, community
I-5 creates a barrier to wildlife, hampering their east/west movements and leading to the death of many animals that attempt to cross it. Recent studies indicate that I-5, with daily traffic volumes between 38,000 and 68,000 vehicles across both study sites, is a large enough barrier to cause
To keep people and goods moving throughout western Washington State, the Washington State Department of Transportation is working with local stakeholders and government leaders to conduct a study to assess existing environmental and traffic conditions and reviewing new
In 2022, WSDOT reviewed state and regional transportation plans, interviewed 30 people made up of transportation riders, providers, and advocates, and developed an economic model to answer the following two questions:
- What is the unmet need for public transportation in the state?
WSDOT, in collaboration with community partners, studied a large area of south Pierce County, identifying potential projects and policies to reduce fatal and serious injury crash potential, improve travel conditions for all travelers, and provide greater system connectivity and resilience.
The pre-design study looked at the signalized intersection on SR 105, South Boone Street, at West Harriman Street. The aging traffic signal at this intersection was last replaced in 1982 and is in need of replacement. The pre-design study conducted stakeholder and public outreach to examine
State Route 112 at Weel Road and Eagle Crest Way is just south of Clallam Bay. This study will make recommendations for improvements at the intersection. The study will engage local stakeholders and the community to identify these improvements. Recommendations made as a result of this study will
Currently, pedestrian access along State Route 142 is limited for people who walk, bike or roll alongside the highway. With input from community members, elected officials and stakeholders, we will develop a plan to improve accessibility for all modes in the community of Klickitat.
The study identifies corridor strategies and solutions to address congestion and traffic operations along State Route 16 between the Tacoma Narrows Bridge and Gorst, as well as portions of SR 3 and SR 304 in Pierce and Kitsap counties.
A study was completed of SR 160 between Phillips Road and Mayvolt Road Southeast/Lake Valley Road Southeast in Kitsap County. The study identified intersection control strategies that have the potential to reduce the frequency and severity of crashes at the intersection of SR 160 (SE Sedgwick
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. As a result of the review, we will replace the existing stop sign with a single lane roundabout at the
State Route 162 is an important north-south link through the Orting Valley community and the surrounding area of southeast Pierce County. The area experiences a high level of growth and development resulting in peak hour congestion that places demands on the highway system. The study identified
A pre-design study was conducted at the intersection of SR 166 and Bay Street, Bethel Avenue and Maple Street in Port Orchard. The existing traffic signal at this intersection has reached the end of its useful life. This in-depth review included collaboration with local business owners, City of
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 Kearney Street Roundabout Project. The SR 20
The SR 20 Skagit River O’Brian Reach Feasibility Study area is located along SR 20 near Rockport at milepost 101. The purpose of the study is to assess floodplain connectivity and channel processes to determine if there is a feasible floodplain restoration action that:
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.
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 operations,
The study will collaboratively address the transportation network performance, accessibility and safety gaps to support local communities and the traveling public in the East Valley area. The study will identify ranked strategies to increase mobility and transportation alternatives for all modes
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 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
Information about the study, the recommended roundabout and feedback WSDOT received during the online open house is now available for