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This project will preserve multiple state routes across Whitman County in Eastern Washington.

Included in the chip seal project will be constructing bituminous surface treatment (BST), planning bituminous pavement, crack sealing, hot mix asphalt (HMA) paving, pavement repair, and…

This project preserved multiple state routes across Pend Oreille, Stevens, Lincoln and Adams counties in Eastern Washington.

Chip sealing is the application of a special protective wearing surface to an existing pavement. Included in the chip seal project will be constructing…

A regional project beginning in March 2024 updated 24 guardrails and attenuators along Interstates 5, 90 and 405, US 2 and State Routes 522 and 527 in King, Snohomish and Whatcom counties. The breakaway cable terminals, or guardrail protective end caps, face oncoming traffic. This project also…

This project preserves multiple state routes across Spokane, Lincoln, Whitman, and Pend Orielle Counties in Eastern Washington.

Chip sealing is the application of a special protective wearing surface to an existing pavement. Included in the chip seal project will be constructing…

This project extended the life of the roadway and reduced the frequency of emergency repairs on sections of four state highways in Clallam, Grays Harbor, Jefferson and Pierce counties.

Chip sealing is a process where crews apply a protective surface to existing pavement.

This project preserves two state routes in Franklin and Adams Counties in Eastern Washington.

SR 21 – SR 260 to US 395 (23.92 miles)
SR 260 – Kahlotus to Washtucna (13.18 miles)

Between summer 2022 and 2023, WSDOT's contractor, Granite Construction Company, began work on a pilot program to rehabilitate the concrete decks of several bridges throughout southwest Washington. Crews removed all non-cement patches and replaced them with cement material, extending the useful…

The Alaskan Way Viaduct Replacement Program consists of 30 projects led by the Washington State Department of Transportation, King County, the City of Seattle and the Port of Seattle. The Federal Highway Administration is a partner in this effort.

The Anacortes Ferry Terminal has provided a gateway to the San Juan Islands and Sidney B.C. for more than 50 years with only minor changes made to the terminal. Washington State Ferries (WSF) plans on updating all four Anacortes Ferry Terminal tollbooths to better serve the ferry customers who use…

The ferry route between Seattle and Bainbridge Island is the busiest in the system for walk-on passengers. This project replaces the existing overhead wooden walkway with a wider, safer concrete and steel structure built to current seismic code.

After SR 99 in Seattle was aligned to run through the SR 99 tunnel, the Battery Street Tunnel was decommissioned and filled and the tunnel's northern approach built into a new arterial street (Seventh Avenue North) featuring bus lanes and reconnected intersections.

This project will repave the railroad crossing utilized by the Washington Eastern Railroad at the intersection of State Route 904 and Betz Road in Cheney.

This project removed fish barriers at two locations: one on State Route 104 at Shine Creek, and the other on State Route 19 at Swansonville Creek.

At both locations, 18-foot three-sided culverts were constructed.

This project will consist of planing and paving both eastbound and westbound driving lanes on Interstate 90 from milepost 138.26 to milepost 148.44, (eastbound) and from milepost 138.55 to milepost 148.44 (westbound). Also, it will pave all eastbound and westbound lanes from MP 175.62 to milepost…

This project will conduct spot repairs on concrete bridge decks by patching potholes and replacing fatigued sections of concrete on seven bridges within Adams, Franklin, Lincoln, Stevens, and Whitman Counties. Once the project is complete, the service life of the bridges will be extended on rural…

The Mukilteo/Clinton ferry route is part of State Route 525, the major transportation corridor connecting Whidbey Island to the Seattle-Everett metropolitan area. It is one of the state's busiest routes, with more than 4 million total riders every year. By 2040, walk-on ridership during the…

Washington State Ferries is replacing the aging and seismically vulnerable Colman Dock in Seattle to maintain its critical role as a regional multimodal transportation hub.

Key project elements include: a concrete and steel trestle, main terminal building, entry building (with retail…

Washington State Ferries (WSF) will rebuild and modernize our fleet and convert our system, the largest in the country, to hybrid-electric power by 2040 following direction from the Washington legislature and governor. Rebuilding the fleet is necessary to ensure reliable ferry service.…

In winter 2023, our contractor began a project on the I-405 corridor, in Tukwila and Bellevue, to strengthen several overpasses so they can better withstand a major earthquake. They will place steel "jackets" around columns that support overpasses to help keep the concrete together in an…

The I-405/Brickyard to SR 527 Improvement Project enhances four and a half miles of the corridor, primarily in Bothell, from just south of the State Route 522 interchange and ending at the SR 527 interchange. WSDOT, Sound Transit and design-build contractor Skanska USA Inc., will deliver…

In fall 2023, contractor crews started construction to replace the damaged northern span of the Lind Avenue Southwest bridge over southbound Interstate 405 in Renton. The Lind Avenue overpass is now back open.

WSDOT and design-build contractor Graham Contracting, Ltd. constructed a new on-ramp to northbound I-405 and a new off-ramp from southbound I-405 at Northeast 132nd Street in Kirkland. This type of interchange is known as a half-diamond. Travelers now have the option to access I-405 at Northeast…

WSDOT, Sound Transit, and design-build contractor Graham Contracting, Ltd. are working to reconstruct and improve the I-405/Northeast 85th Street interchange. This project design supports Sound Transit's Stride Bus Rapid Transit (BRT), improves transit connections on Northeast 85th Street, and…

Travelers on Interstate 405 between Renton and Bellevue experience one of the state’s worst commutes. The I-405/Renton to Bellevue Widening and Express Toll Lanes project includes multimodal transportation and safety improvements to offer more reliable travel choices and keep drivers, transit…

The Ripley Lane Stream Connection Project is part of a series of fish barrier corrections planned by WSDOT for the I-405/SR 167 corridor. The Ripley Lane Stream Connection Project will construct new stream channels by combining two culverts into one open channel. We determined that the proposed…

The I-405/SR 167 Corridor Program stems from the I-405 Master Plan and SR 167 Master Plan, foundational documents that guide project development, funding and delivery. The I-405 Master Plan alone includes over 150 projects designed to improve travel between Lynnwood and the Renton/Tukwila area.…

This project aims to improve mobility for travelers who use the I-5 - Northeast 179th Street interchange. Signalized intersections will be removed and replaced with roundabouts at the on- and off-ramps to and from I-5. Roundabouts help to relieve congestion by keeping people moving safely through…

This project will create new non-motorized access for people between the Tillicum and Woodbrook neighborhoods.

This project widened northbound and southbound I-5 so that each direction has four general-purpose lanes each and one HOV lane from M Street to Portland Avenue in Tacoma

To widen both directions of I-5, WSDOT rebuilt the Pacific Avenue and East McKinley Way bridges over I-5 and…

WSDOT extended the auxiliary lane south approximately 1.5 miles, so that it starts at the Mounts Road overpass. Trucks approaching the weigh station along with entering and exiting traffic use this lane while the majority of traffic uses the adjacent three through lanes.

To…