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Learn about current transportation network improvement and preservation activities throughout the state.

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224 results

Major Project

SR 520 Bridge Replacement and HOV Program

Timeline: 2011 - 2030
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
  • Road
  • Completed
  • King County
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.
  • Road
  • Completed
  • King County
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
  • Road
  • Construction
  • King County
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 - 2023
  • Road
  • Construction
  • King County
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.
  • Road
  • Completed
  • King County
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 2024-2030
  • Road
  • Not started
  • King County
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.
  • Road
  • Completed
  • King County
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.
  • Road
  • Pre-construction
  • King County
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 Summer 2022
  • Road
  • Construction
  • King County
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
  • Road
  • Pre-construction
  • Snohomish County
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 525 — Clinton Ferry Terminal Vicinity — Pedestrian Connectivity

Timeline: November 2021 - Fall 2022
  • Ferry
  • Road
  • Not started
  • Island County
This connectivity project will improve the pedestrian access route on State Route 525 in Clinton from the Park & Ride at Deer Lake Road (milepost 8.96) to the Washington State Ferries — Clinton Ferry Terminal (milepost 8.51).

Plans call for new sections of sidewalk, crosswalks,…
Project

SR 526 - Corridor Improvements

Timeline: Spring 2017 - Winter 2023
  • Road
  • Pre-construction
  • Snohomish County
Portions of the State Route 526 corridor will be improved with construction of an eastbound lane between Seaway Boulevard and I-5, improved signal operations at the SR 526/527 intersection and new ramp meters from eastbound SR 526 to northbound I-5.
Project

SR 527 - Penny Creek - Fish Passage

Timeline: Fall 2022 - Fall 2025
  • Road
  • Pre-construction
  • Snohomish County
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 530 - 59th Ave NE and 211th Place NE intersection improvements

Timeline: Summer 2021 - Fall 2023
  • Road
  • Pre-construction
  • Snohomish County
We will build two compact roundabouts on SR 530 at the intersections of 59th Avenue Northeast and 221th Place Northeast, just west of Arlington.

SR 530 is a heavily traveled highway with commuters, large trucks, farm equipment and travelers sharing the highway to reach destination…
Project

SR 531 - 43rd Ave NE to 67th Ave NE - Widening

Timeline: July 2019 - Fall 2024
  • Road
  • Pre-construction
  • Snohomish County
This section of SR 531 between 43rd Avenue Northeast and 67th Avenue Northeast in Arlington will be widened to add a second lane in each direction. In addition, roundabouts will be added at four intersections to improve safety, travel times and reduce congestion.
Project

SR 538 - Logan Creek Fish Passage

Timeline: Summer 2019 - Spring 2022
  • Road
  • Construction
  • Skagit County
This project provides for the improvement of Logan Creek fish passage along SR 538 in Mount Vernon located in Skagit County by replacing the existing culvert with a new buried fish passage structure.

Project

SR 544 Unnamed Tributary to Fourmile Creek Fish Passage

Timeline: Fall 2021 - Fall 2022
  • Road
  • Construction
  • Whatcom County
This project will remove the existing barrier where an Unnamed Tributary to Fourmile Creek crosses under State Route 544 at milepost 3.51, just west of Noon Road. This location is about two miles west of Everson and 3.5 miles south of Lynden in Whatcom County.

Project

SR 546 - Kamm Ditch - Fish Passage

Timeline: Spring 2022-Fall 2022
  • Road
  • Construction
  • Whatcom County
This project will improve the Kamm Ditch fish passage on SR 546 in Whatcom County between milepost 4.13 and milepost 4.27.
Project

SR 546 Pepin Creek and Duffner Ditch Fish Passage

Timeline: Summer 2022 - Fall 2022
  • Road
  • Construction
  • Whatcom County
This project will replace three fish barriers with fish passable structures. Two of the barriers are located along SR 546 (East Badger Road) on either side of Double Ditch Road and the third barrier is located just west of Double Ditch Road near Lynden. This project is located between milepost .1…
Project

SR 6 - Two Tributaries to Chehalis River Fish Passage

Timeline: Spring 2020 - Summer 2022
  • Road
  • Construction
  • Lewis County
Beginning in summer 2020 and continuing through summer 2022, contractor crews working for the Washington State Department of Transportation began work to remove and replace two existing culverts leading to the Chehalis River located underneath SR 6 near Twin Oaks Road (between mileposts: 46.32 to…
Project

SR 7/SR 507 to S of S 38th St - Paving - Complete August 2022

Timeline: Spring 2022 - Summer 2022
  • Road
  • Completed
  • Pierce County
This summer, construction crews working for WSDOT repaired and replaced worn sections of asphalt on SR 7. The work zone was broken up into two areas. The first was from the intersection of SR 507 near Joint Base Lewis-McChord, to 169th Street. Crews paved the northbound right lane only. The second…
Project

SR 9 - 176th Street SE to SR 96 - Widening

Timeline: 2025 - 2027
  • Road
  • Pre-construction
  • Snohomish County
To address increased congestion, WSDOT has widened SR 9 from two lanes to four from its southern starting point to Marsh Road, except for a 3-mile section in the middle—from 176th Street Southeast to SR 96—where there is only one northbound lane and two southbound lanes. This project will add a…
Project

SR 9 - SR 204 Intersection Improvements

Timeline: July 2016 - December 2023
  • Road
  • Construction
  • Snohomish County
The intersection of SR 9 and SR 204 in Lake Stevens will be improved by adding four roundabouts and widening SR 9 to two lanes in each direction immediately south of the intersection. These improvements will help manage congestion and improve mobility, provide better access to area businesses and…
Project

SR 9 - Unnamed Tributary to Landingstrip Creek - Fish Passage - Complete Fall 2021

Timeline: December 2020 - Fall 2021
  • Road
  • Completed
  • Whatcom County
This project will improve the passage of migratory fish by replacing the culvert underneath SR 9 at milepost 70.60, where an unnamed tributary runs to Landingstrip Creek in Whatcom County.
Project

SR 9 - Unnamed Tributary to Pilchuck Creek - Fish Passage

Timeline: Fall 2019 - Summer 2022
  • Road
  • Construction
  • Skagit County
  • Snohomish County
A culvert that runs under State Route 9 at milepost 34.7, south of Lake McMurray near the North Centennial Trail Trailhead, was failing and needed to be replaced. The bottom of the culvert had rusted away, which resulted in water washing away the side of the road. This caused a sinkhole on the…
Project

SR 9 – Lake Creek and Norway Park Creek – Fish Passage

Timeline: July 2022 - October 2022
  • Road
  • Construction
  • Skagit County
Beginning in July 2022, contractor crews working for WSDOT will remove two fish barriers under State Route 9 in Lake McMurray in Skagit County at Lake Creek and Norway Park Creek, replacing them with two new fish passable structures.
Project

SR 9 – Marsh Road to 2nd Street Vicinity – Widening

Timeline: 2019 - 2026
  • Road
  • Pre-construction
  • Snohomish County
This project will widen State Route 9 between Marsh Road and 2nd Street near the city of Snohomish, build southbound bridges directly to the west of the existing bridges—which will become northbound lanes—over the Snohomish River, and rebuild the on-ramp from 2nd Street to southbound SR 9.
Project

SR 9/Bickford Ave. Intersection Improvements

Timeline: May 2022 - September 2022
  • Road
  • Construction
  • Snohomish County
In June 2022, Granite Construction Company, contractor crews working for WSDOT, will build a roundabout at the intersection of State Route 9 and Bickford Avenue.
Project

SR 9/South Lake Stevens Road – Intersection Improvements

Timeline: February 2022 - fall 2022
  • Road
  • Construction
  • Snohomish County
Beginning in February 2022, Interwest Construction Inc., contractor crews working for WSDOT, will construct a roundabout at the intersection of SR 9 and South Lake Stevens Road to improve safety and mobility. Crews will also improve fish habitat by replacing the existing culvert under South Lake…

8,683 animals crossed the Snoqualmie Pass East Project area

as recorded by WSDOT and partners in 2020 and 2021.

46% increase in Amtrak Cascades ridership to 251,000 passengers

in 2021 compared to 172,000 in 2020.

Nine wetland and stream mitigation sites across 32.7 acres added

to our monitoring program in 2021 to help offset climate change impacts.