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Snohomish County keeps growing and traffic grows with it. State Route 9 was once a rural, two-lane highway. Today, it serves as a key north-south alternative to I-5 for commuters and freight moving through Snohomish County. Peak travel times now bring regular congestion.

WSDOT…

Reconnecting waterways where our roads act as barriers is a priority for the state. In western Washington, that means building hundreds of fish passable structures under state highways to create habitat essential for meeting fish recovery goals. Beginning as early as 2027, WSDOT will install a new…

State Route 900/Martin Luther King Jr. Way South in the unincorporated Skyway-West Hill community is a busy roadway between Renton and Seattle serving drivers, freight, public transit, bicyclists and pedestrians. This project will construct bicycle and pedestrian facilities on SR 900 that allow…

As part of the state's fish recovery efforts, WSDOT has made it a priority to reconnect waterways where our roads act as barriers. In western Washington, that means building hundreds of fish passable structures under state highways in the next decade to create habitat gain essential for…

Beginning in July 2024, contractor crews working for WSDOT re-establishd fish habitat in the Pilchuck River along State Route 92, just south of Sleepy Hollow Road, near Granite Falls. This project replaced large woody debris constructed as fish habitat in 2016, much of which had washed away. This…

As part of the state's fish recovery efforts, WSDOT has made it a priority to reconnect waterways where our roads act as barriers. In western Washington, that means building hundreds of fish passable structures under state highways in the next decade to create habitat gain essential for…

On Feb. 18, 2026, Washington State Department of Transportation bridge inspectors identified cracks in the steel deck grates on the northbound State Route 99 First Avenue South bridge in Seattle, requiring two lanes to close. Crews will conduct temporary repairs in early March that restore the…

Part of a culvert running underneath the State Route 99 on-ramp to eastbound SR 518 in Tukwila failed, damaging the on-ramp as well as the shoulder along the Airport Expressway on-ramp to eastbound SR 518.

Contractor crews repaired failed section of the culvert to prevent further…

The SR 99 tunnel replaced the Alaskan Way Viaduct along Seattle's central waterfront, carrying State Route 99 beneath downtown Seattle. The 2-mile tunnel opened to drivers in February 2019.

The purpose of this project is to preserve the existing structural integrity of Bridge 99/530E over the Duwamish River, extend the service life of the structure, keep the old control tower and the lower levels of the bridge dry, and allow for the operation and inspection of the lower levels of the…

This project will resurface the northbound and southbound lanes of State Route 99 from South 272nd Street to SR 516 to extend the pavement service life. Crews will grind and inlay new Hot Mix Asphalt (HMA), perform pavement repair, traffic loop replacement, striping and traffic control. Pedestrian…

Contractors working on behalf of WSDOT will replace 13 expansion joints on the State Route 99 Spokane Street Bridge and rehabilitate the bridge’s drainage system. This work will help preserve the service life of the bridge.

Crews working for WSDOT textured the existing concrete pavement of the north and southbound State Route 99 tunnel. The technique of shot-blasting the roadway provided added friction for vehicles’ tires and improved traction.

This project will remove barriers to fish under several state highways in Kitsap County. Work is planned in 29 locations on state routes 3, 104, 303, 307 and 308.

Once complete, this project will restore approximately 93 miles of potential habitat across the Kitsap Peninsula.

This project has rehabilitated nearly two miles of State Route 99 from the SR 516 intersection in Des Moines/Kent to South 200th Street in SeaTac. Crews ground away existing asphalt and installed a fresh layer of hot mix asphalt, giving the roadway a smoother surface and extending its lifespan.…

The eastbound span of the Tacoma Narrows Bridge opened July 15, 2007 as the first modern toll road in Washington.

What at the time was considered state of the art technology is nearing the end of its usable life. Over the course of several months WSDOT will replace the aging and…

We’re updating our ticketing and reservation systems to improve the customer experience when buying tickets and booking vehicle reservations. The types of tickets we offer and how vehicle reservations work aren’t changing. However, the tools for buying tickets and booking reservations will be…

Crews working for WSDOT built a replicated stream between Coffee Creek and Goldsborough Creek in Shelton. The project also rebuilt both southbound on- and off-ramps at the US 101/West Shelton/Matlock interchange.

WSDOT replaced the US 101 Elwha River Bridge in Port Angeles. Replacing the bridge has ensured that US 101 continues to be a reliable transportation facility for decades to come.

The new bridge is 40 feet wide and has two 12-foot lanes with two-8 foot shoulders. (The old bridge was…

This project addressed multiple barriers to fish under US 101 between Sequim and Gardiner.

Washington State Department of Fish and Wildlife identified these sites as barriers to salmon migration and other resident fish species.

This fish barrier removal project replaces an outdated culvert under US 101 south of Forks. A 175-foot-long concrete girder bridge will replace the existing metal pipe to improve fish migration in May Creek.

This project will correct 29 identified streams and culverts that cross under US 101 and SR 109 in Grays Harbor, Jefferson and Clallam Counties. The culverts under the highways do not allow fish to access vital habitat.

Once complete, this project will restore nearly 37 miles of…

This project will make repairs to the roadway on US 101 near Dowans Creek Road in Jefferson County. Work at this site includes stabilizing the slope on the southbound side of US 101. An emergency contract has been issued for this stabilization work.

This project replaced six culverts under US 101 in Grays Harbor County. The culverts were located under US 101 between Aberdeen and Humptulips.

This project replaced bridge bearings under the north side of the US 101 Chehalis River Bridge in Aberdeen.

This project will remove barriers to fish migration under US 101 at two locations in Jefferson and Clallam counties.

This project repaired and upgraded two machine rooms that house equipment that operates the US 101 Hoquiam River Riverside Bridge in Grays Harbor County.

Work included repairs to the existing machine rooms, removing and replacing the old machine room walls and roof, and painting the…

This project replaced culverts under US 101 in Clallam and Jefferson Counties.

This project removed barriers to fish migration under US 101 at six locations in Grays Harbor and Jefferson counties.

This project will make repairs to the roadway on US 101 south of Forks near the Jefferson-Clallam County border. Work at this site includes: rebuilding the washed-out area of highway, rebuilding and reinforcing the slope and drilling new drains into the hillside. An emergency contract will be…