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Learn about current transportation network improvement and preservation activities throughout the state.
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341 results
Project
I-90 – SR 18 Interchange Improvements
Timeline: 2022 - 2025
Growth in Snoqualmie Valley has made the I-90/SR 18 interchange one of the busiest in the state, causing backups during peak times and busy travel weekends. To improve traffic flow, WSDOT is building a diverging diamond interchange and adding two lanes on SR 18 between the interchange and Deep…
Project
I-90, SR 202, SR 203 & SR 900 – Adaptive Management
Timeline: Summer 2025 - Summer 2026
The project has four locations: Interstate 90 at Issaquah Creek and tributaries, State Route 202 at Little Bear Creek, SR 203 at Thayer Creek, and SR 900 at Green Creek. Each project will enhance fish habitat and allow for fish passage by adding meander bars, modifying stream bed material,…
Project
I-90/104th Street Vicinity Fish Passage
Timeline: Spring 2025 - Fall 2025
Crews working for WSDOT will realign the stream and grade the channel for Unnamed Tributary to Lake Creek on Southeast 104th Street just south of the city of Snoqualmie in King County. The stream’s culvert will remain as-is during this project’s stream bed work. This project is required to support…
Project
I-90/142nd Pl SE over I-90 - Bridge repair - Complete April 2023
Timeline: Winter 2023
This work was completed in spring 2023. Contractor crews repaired a steel girder that supports 142nd Place Southeast over Southeast Eastgate Way and I-90. The girder was damaged when it was struck by a truck hauling construction equipment that was too tall.
Project
I-90/EB East Channel Bridge - Modular Assembly Joints
Timeline: Fall 2023 - Fall 2026
The Modular Assembly Joints on the I-90 EB East Channel Bridge are deteriorating and have reached the end of their service life. Replacing the existing expansion joints will preserve the bridge’s structural integrity and extend its service life.
Project
I-90/EB Mercer Slough to 150th Ave SE - Paving
Timeline: Spring 2025 - Summer 2025
This project will pave nearly two miles of eastbound Interstate 90 from 118th Avenue Southeast (MP 9.72) to 150th Avenue Southeast (MP 11.55) in Bellevue. Crews working for WSDOT will rehabilitate the existing roadway surface and restore the roadway striping. In addition, on the bridge over…
Project
I-90/Homer Hadley East Approach Bridge - Modular Expansion Joint - Complete September 2022
Timeline: Summer 2022-fall 2022
In September 2022, contractor crews working for WSDOT replaced the original expansion joint on the east end of the westbound I-90 Homer Hadley bridge that connects Mercer Island to Seattle.
Project
I-90/WB E Sunset Way to E Fork Issaquah Crk - PCCP Replace & Deck Overlay - Complete October 2023
Timeline: Summer 2022 - Fall 2023
In 2022, we added drainage and replaced about 1,550 feet of concrete panels on westbound I-90 with asphalt. During 2023 we replaced select concrete panels to smooth a 1-mile section of rough freeway about 1.5 miles west of SE High Point Way. In addition, we completed repairs at two bridges along…
Major Project
Interstate Bridge Replacement Program
Timeline: 2019 - 2035
The Interstate Bridge Replacement program is a bi-state effort with the Washington State Department of Transportation and the Oregon Department of Transportation to replace the aging Interstate Bridge along I-5 over the Columbia River between Portland and Vancouver. The program will build a new,…
Major Project
North Spokane Corridor
Timeline: August 2001 - 2030
The North Spokane Corridor (NSC) is a 10.5-mile multi-modal corridor. When complete, the NSC will be a 60-mile per hour, north/south limited access facility that connects I-90 at the south (just west of the existing Thor/Freya interchange) and connects to US 2 (at Farwell Road) and US 395 (at…
Project
Northwest Region Strategic Concrete Bridge Deck Preservation - Complete November 2023
Timeline: Fall 2021 - Fall 2023
We repaired or replaced the concrete on 17 bridges in King, Snohomish, Skagit and Whatcom counties. Before this project, many of these concrete bridge decks had patches covering old potholes and ruts. Contractor crews removed damaged and patched areas and replaced it with new slabs of concrete.…
Project
Northwest Region/North and South Strategic Pavement Preservation
Timeline: Fall 2024 - Fall 2025
Crews working for WSDOT will perform crack sealing and asphalt patching on numerous routes in King, Snohomish, Skagit, Whatcom and Island counties. The work also includes concrete panel replacement on seven miles of Interstate 5 from just north of the Ship Canal Bridge to just south of Northeast…
Project
NWR Emergency Pavement Repair - Complete Summer 2023
Timeline: July 2022 - June 2023
The Northwest Region Emergency Pavement Repair project covered 88 locations among 23 communities in King, Snohomish, Skagit and Whatcom counties. The repairs spanned three interstates, 12 state highways and about 20 miles of pavement repair, including four bridge decks.
Completed in…
Completed in…
Project
Olympic Region Strategic Bridge Preservation 2022-23 - Complete Summer 2022
Timeline: Spring 2022 - Fall 2023
Crews repaired and replaced damaged driving surfaces of several bridges in Grays Harbor, Mason, Jefferson, and Kitsap Counties.
Major Project
Puget Sound Gateway Program
Timeline: 2015-2029
The Puget Sound Gateway Program combines the SR 509 Completion Project in King County and the SR 167 Completion Project in Pierce County to complete critical missing links in Washington state's highway and freight network. These projects build important new connections to the state's…
Project
Revive I-5: Preserving a vital freeway
Timeline: Now into 2030s
Dozens of preservation projects are planned to revive Interstate 5 in King and Snohomish counties. Washington’s main freeway was built in the 1960s and needs major preservation and renovation work. Over the coming years, Revive I-5 projects will include pavement repair and full replacement,…
Project
SE Burley-Olalla Rd to Sidney Rd Paving - Complete October 2023
Timeline: July 2023 - October 2023
Workers repaired the surface of westbound SR 16. Repairs were also made to three bridge expansion joints.
Project
South Access - Surface Street Connections Project
Timeline: July 2021 - Winter 2023
This project completes final roadway work around the south portal of the SR 99 tunnel and builds new pedestrian and bicycle amenities that connect Seattle’s stadiums with the waterfront.
Project
SR 104 - Hood Canal Bridge - Center Lock Rehabilitation
Timeline: May 2021 - Fall 2024
Crews will upgrade and replace key elements of the SR 104 Hood Canal Bridge. The construction bolsters systems that guide the bridge together and keep both halves of the bridge connected.
Project
SR 104 - Lyon Creek Fish Passage
Timeline: Spring 2025 - Spring 2026
This project will remove a fish passage barrier on State Route 104 at Lyon Creek just west of 35th Avenue Northeast in Lake Forest Park. Contractor crews working for WSDOT will upgrade an existing 6-foot by 4-foot box culvert with a 24-foot structure. This new structure has the potential to open…
Project
SR 104 - Paradise Bay - Shine Road & SR 19 - Intersection Safety Improvements
Timeline: May 2024 - May 2025
This project improves safety along State Route 104 in Jefferson County at Shine Road/Paradise Bay Road and at State Route 19. At Shine Road/Paradise Bay Road, a single-lane metered roundabout will be built. The meter will be active only after a closure at the nearby Hood Canal Bridge. At SR 19, a…
Project
SR 104 - SR 19 - Intersection Safety Improvements
Timeline: Late Spring 2024 - Early Winter 2024
To improve safety and reduce head-on collisions, crews will construct a single-lane roundabout at State Route 104 and SR 19 (Beaver Valley Road).
Roundabouts are a proven solution to reduce the frequency and severity of collisions while maintaining a consistent flow of traffic.…
Roundabouts are a proven solution to reduce the frequency and severity of collisions while maintaining a consistent flow of traffic.…
Project
SR 104 Kingston Ferry Terminal Traffic Improvement
Timeline: Timeline to be determined
This project would relocate travelers heading to and from the Kingston Ferry Terminal to Northeast 1st Street.
Project
SR 106 Et Al - OR Region Wide - Chip Seal - Complete October 2022
Timeline: April 2022 - October 2022
This project repaired and preserved several highways in Mason, Jefferson, Clallam and Pierce Counties.
Project
SR 106/Twanoh Creek - Remove Fish Barrier - Complete September 2023
Timeline: June 2023 - September 2023
WSDOT removed a barrier to fish under SR 106 at Twanoh State Park. WSDOT removed the existing culvert and replaced it with a box culvert.
Project
SR 108 - US 101/Mason and Thurston Co Fish Barriers - Remove Fish Barriers
Timeline: Summer 2023 - Fall 2024
This project will remove multiple barriers to fish under two state highways. Crews will work on SR 108 near Kamilche and US 101 near the Thurston/Mason County line.
Project
SR 109 Hoquiam to Ocean City – Remove Fish Barriers
Timeline: Spring 2024 - Fall 2024
This project will replace culverts under SR 109 in Grays Harbor County.
Project
SR 109 Ocean City to Taholah – Remove Fish Barriers
Timeline: Fall 2025 - Fall 2027
This project will remove five barriers to fish under SR 109 on the Quinault Indian Nation.
Project
SR 109/Grass Creek Bridge – Emergency Repair - Completed January 2023
Timeline: Winter 2022 - Late Winter 2023
This project involved repairs to the Grass Creek Bridge on State Route 109 west of Hoquiam. Work at this site included installing two steel piles and a steel cross beam at three of the bridge pier locations to support the bridge and restore its weight capacity.
Project
SR 109/W of Hoquiam - Stabilize Slope - Complete March 2023
Timeline: Early spring 2023
Crews worked to stabilize the hillside above SR 109 west of Hoquiam.
166,800 electric vehicle
registrations in Washington in 2023, up from 114,600 in 2022.
87 wetland compensation sites
actively monitored on 918 acres in 2023.
25,000 safe animal crossings
in the Snoqualmie Pass East Project area since 2014.