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Learn about current transportation network improvement and preservation activities throughout the state.
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325 results
Project
SR 510 - Yelm Loop - New Alignment Phase 2
Timeline: Spring 2025 - Fall 2027
Crews will build the three remaining miles of SR 510 between Cullens Road and 170th Street Southeast in Yelm. The new connection, like the previously built Phase 1, is proposed to be a two-lane highway with bicycle and pedestrian facilities.
Project
SR 513 - Montlake Bridge - Mechanical Rehab, Deck Replacement & Joint Repair - Complete May 2022
Timeline: Summer 2021 - Spring 2022
In 2021, contractor crews working for WSDOT replaced the more than 20-year-old worn grid deck on the Montlake Bridge. They also made expansion joint and mechanical repairs so the movable span can continue to operate reliably and meet the growing multimodal traffic demands of northeast Seattle. In…
Project
SR 516/Barnes Creek fish passage
Timeline: 2021-2024
Prior to construction, which ended in October 2023, a failing clay culvert just 2 feet in diameter carried Barnes Creek under SR 516 near Des Moines. This narrow culvert was a barrier for fish trying to swim upstream. This project replaced that small clay culvert with a new cement box culvert 20…
Project
SR 518/24th Avenue S Bridge - Girder Replacement - Complete November 2023
Timeline: Summer to Fall 2023
During summer 2023, our contractor crews replaced the damaged girder on the 24th Avenue South bridge over SR 518 near the Sea-Tac International Airport. Crews also made bridge drain and drainpipe improvements in the area.
Project
SR 520 - Floating Bridge and Approaches Bridge Decks and Soffit Sealer
Timeline: Summer 2024 - Fall 2024
Crews working for WSDOT will apply spray sealant to the bridge deck and soffits near expansion joints in both directions of the State Route 520 Evergreen Point floating bridge. The sealant will protect the bridge from corrosion, prolong its service life and help keep the bridge in a state of good…
Project
SR 520 148th Ave NE interchange - Overlake Access Ramp - Complete December 2023
Timeline: Summer 2021-Fall 2023
With this Connecting Washington project, we made multiple improvements to the State Route 520/148th Avenue Northeast interchange within the cities of Bellevue and Redmond.
Our contractor, Granite Construction, built a direct-access off-ramp from eastbound SR 520 to the Overlake…
Our contractor, Granite Construction, built a direct-access off-ramp from eastbound SR 520 to the Overlake…
Major Project
SR 520 Bridge Replacement and HOV Program
Timeline: 2011 - 2031
The SR 520 Bridge Replacement and HOV Program enhances travel safety and mobility with modern, structurally stronger bridges, as well as substantial transit and roadway improvements along this urban corridor. Built in stages, the improvements extend from I-405 in Bellevue to I-5 in Seattle.
Project
SR 520 Eastside Transit and HOV Project - Complete Summer 2015
Timeline: Construction began 2011; completed in 2015
This project added bus/carpool lanes in both directions between 108th Avenue Northeast in Bellevue and Lake Washington’s eastern shore. The project also built three landscaped, community-connecting highway lids over the highway, two transit stations in the highway median and the first leg of a…
Project
SR 520 Floating Bridge and Landings Project - Complete Summer 2017
Timeline: Bridge construction began in spring 2012 and was completed in summer 2017.
We replaced the world's longest floating bridge – a four-lane, 1960s-era structure – with a safer, six-lane bridge designed to withstand stronger windstorms and waves. Opened in April 2016, the new bridge also added shoulders for disabled vehicles and a separated, 14-foot-wide path for…
Project
SR 520 I-5 Express Lanes Connection Project
Timeline: August 2021 - 2024
The SR 520/I-5 Express Lanes Connection Project will create a dedicated reversible transit and carpool connection between SR 520 and the I-5 Express Lanes, along with a reversible transit/carpool ramp at the I-5/Mercer Street interchange.
Project
SR 520 Montlake Project
Timeline: Summer 2019 - 2024
The Montlake Project will improve transportation for both motorized and nonmotorized travel along the corridor with a new SR 520 eastbound bridge over Union Bay. This project also builds a new, three-acre lid covering the highway in Montlake that will include regional transit stops and open green…
Project
SR 520 Pontoon Construction Project - Complete Spring 2015
Timeline: Construction of the casting basin and pontoons began in Aberdeen in 2011. Pontoon construction ended in spring 2015.
The SR 520 floating bridge is supported and stabilized by 77 concrete pontoons . The Pontoon Construction Project built a casting basin and 33 of the bridge’s pontoons in Aberdeen, Washington. We built 44 of the bridge’s smaller pontoons in Tacoma, Washington, as part of the Floating Bridge and…
Project
SR 520 Portage Bay and Roanoke Lid Project
Timeline: Estimated 2024-2031
The Portage Bay Bridge and Roanoke Lid Project will replace the aging Portage Bay Bridge with a seismically resilient structure that includes improved bus/carpool travel and an extension of the SR 520 Trail. This project also builds a landscaped lid between Seattle’s Roanoke Park and North Capitol…
Project
SR 520 West Approach Bridge North Project - Complete December 2017
Timeline: Construction began in September 2014 and finished in December 2017.
The West Approach Bridge North Project extended SR 520’s three westbound lanes, including a transit/HOV lane, from the new floating bridge to Seattle’s Montlake neighborhood. It also expanded the new SR 520 Trail across Lake Washington to Seattle.
Project
SR 520/124th Avenue NE Interchange Project
Timeline: This project is currently in the preliminary engineering stage.
We are examining solutions to reduce congestion at the I-405/SR 520 interchange. Currently, over half the trips from westbound SR 520 are traveling to the Bellevue vicinity. A new project will allow westbound drivers the option to access the downtown Bellevue vicinity by exiting SR 520 onto 124th…
Project
SR 522 - I-5 to 61st Ave NE - Paving & ADA Compliance
Timeline: Spring 2020 to Fall 2022
WSDOT contractor crews will repave sections of SR 522, commonly known as Lake City Way or Northeast Bothell Way, which were last paved in 2002.
Project
SR 522 - Paradise Lake Rd to Snohomish River Br - Interchange & Widening
Timeline: 2017 - 2025
SR 522 in Snohomish County is an increasingly important north-south route connecting communities between Woodinville and Monroe. One section between Paradise Lake Road in Maltby and the Snohomish River remains one-lane in each direction. We plan to widen the highway to two lanes in each direction,…
Project
SR 522/Thornton Creek Fish Passage
Timeline: 2023-2028
Reconnecting waterways where roads act as barriers is a priority for the state. In western Washington, this means building hundreds of fish-passable structures under state highways to create habitat that is essential for meeting fish recovery goals.
A culvert below State Route 522…
A culvert below State Route 522…
Project
SR 524/Martha Creek to Swamp Creek Fish Passage
Timeline: Fall 2025 - Spring 2028
This project will remove a barrier to fish passage along Martha Creek on State Route 524 near Lynnwood. Contractor crews working for WSDOT will remove the existing culvert and replace it with a fish-passable structure. This new structure has the potential to open more than 1.5 miles of habitat for…
Project
SR 524/Scriber Creek Fish Passage
Timeline: Spring 2023 - Summer 2028
Reconnecting waterways where roads act as barriers is a priority for the state. In western Washington, this means building hundreds of fish passage structures under state highways to create habitat that is essential for meeting fish recovery goals.
A culvert under State Route 524…
A culvert under State Route 524…
Project
SR 525 Pedestrian and Traffic Improvements
Timeline: October 2023 - Spring 2024
In fall 2023, we added 4 feet of width to a sidewalk along northbound State Route 525/Mukilteo Speedway in Mukilteo to make it 7.5 feet wide on a bridge over the BNSF railroad tracks. We also added new ADA-compliant curb ramps and upgraded the railing between Second and First streets.
Project
SR 525 — Clinton Ferry Terminal Vicinity — Pedestrian Connectivity - Completed June 2023
Timeline: Spring 2023 - Fall 2023
This connectivity project improved the pedestrian access route on State Route 525 in Clinton from the Park & Ride at Deer Lake Road (milepost 8.9) to the Washington State Ferries — Clinton Ferry Terminal (milepost 8.5).
Project improvements included the sidewalk, crosswalks,…
Project improvements included the sidewalk, crosswalks,…
Project
SR 525/Box Springs, Maple Creek and Unnamed Tributary to Swamp Creek Fish Passage
Timeline: Fall 2025 - Spring 2028
This project will remove three barriers to fish passage along Box Springs Creek, Maple Creek and Unnamed Tributary to Swamp Creek under State Route 525 near Lynnwood. Contractor crews working for WSDOT will remove existing culverts and replace them with fish-passable structures. These new…
Project
SR 525/I-405 Interchange to SR 99 Vicinity - Paving & ADA
Timeline: Summer 2025 - Fall 2025
Crews working for WSDOT will pave roughly two miles in both directions of State Route 525 from the Interstate 405 interchange to just south of 148th Street Southwest, as well as, eight ramps. The two bridges over Alderwood Mall Parkway and Maple Road will not be paved. Once contractor crews finish…
Project
SR 526 - Airport Road to Casino Road Seismic Retrofit - Complete December 2023
Timeline: February 2023 to December 2023
Our contractor crews strengthened four bridges along State Route 526 in Everett so they can better withstand a major earthquake. They wraped steel “jackets” around the columns that support the bridges to hold the concrete together in an earthquake, reducing the chance of collapse. They also added…
Project
SR 526 - Corridor Improvements
Timeline: Spring 2017 - Spring 2026
Portions of the State Route 526 corridor will be improved with construction of an eastbound lane between Hardeson Road/5th Ave NW and I-5, improved signal operations at the SR 526/527 intersection and new ramp meters from eastbound SR 526 to northbound I-5. Work includes roadway widening in…
Project
SR 527 - Penny Creek - Fish Passage
Timeline: Fall 2022 - Fall 2025
As part of WSDOT’s fish passage program, we will build a 26-foot fish-passable structure under SR 527 just south of 164th Street Southeast in Mill Creek. The current 9-foot culvert causes water to flow too fast for fish to continue upstream. The new bridge span will open more than 8 miles of…
Project
SR 528/Munson Creek to Allen Creek Fish Passage
Timeline: Spring 2022 - Fall 2027
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…
Project
SR 529/Snohomish River & Steamboat Slough - Bridge Repair, Rehab & Paint
Timeline: Summer 2023 – Winter 2024
Corrosion from weather is damaging the Snohomish River Bridge and Steamboat Slough Bridge. Beginning in 2023, crews working for WSDOT will rehabilitate the northbound SR 529 Snohomish River Bridge between Everett and Marysville by repairing or replacing steel truss elements, substructure elements,…
Project
SR 530 - 59th Ave NE and 211th Place NE intersection improvements - Complete August 2023
Timeline: Summer 2021 - Fall 2023
WSDOT built two compact roundabouts on SR 530 at the intersections of 59th Avenue Northeast and 211th Place Northeast, just west of Arlington. These compact roundabouts reduce the risk of serious collisions at these intersections as drivers will no longer have to make turns across lanes of fast-…
Slow down – lives are on the line.
In 2023, speeding continued to be a top reason for work zone crashes.
Even one life lost is too many.
Fatal work zone crashes doubled in 2023 - Washington had 10 fatal work zone crashes on state roads.
It's in EVERYONE’S best interest.
95% of people hurt in work zones are drivers, their passengers or passing pedestrians, not just our road crews.