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Beginning in September 2023, a regional pavement repair project improved and preserved a five-mile stretch of State Route 18 near the Tiger Mountain State Forest. The project will seal cracks between Issaquah-Hobart Road Southeast and just south of Raging River. After pausing during the winter, the…

To address congestion at the I-5/SR 528 interchange and on I-5 between Everett and Marysville, WSDOT will build a new roundabout at the I-5/SR 529 interchange, add new ramps from I-5 northbound to SR 529 and SR 529 to southbound I-5, and extend the I-5 northbound HOV lane from near US 2 to SR 529.

Corrosion from weather can damage bridges. Beginning in summer 2023, contractor crews will clean and paint the metal surfaces of the I-5 Snohomish River Bridge in Everett to prevent this. This work will prolong the life of the bridge.

The Marine Drive and 88th Street Northeast interchanges near Marysville are frequently congested, with traffic backing up onto I-5. They're also two of only three access points to the Tulalip Tribes reservation. The Tribes are leading this project to improve access and mobility at the…

Contractors working on behalf of WSDOT will build a unique compact roundabout at the intersection of SR 203, High Rock Road, and 203rd Street Southeast to improve both mobility and safety.

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,…

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…

Beginning in October 2023, we will add 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 will add new ADA-compliant curb ramps and upgrade the railing between Second and First…

Through December 2023, our contractor crews will strengthen four bridges along State Route 526 in Everett so they can better withstand a major earthquake. They will wrap steel “jackets” around the columns that support the bridges to hold the concrete together in an earthquake, reducing the chance…

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.

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…

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,…

WSDOT will build two compact roundabouts on SR 530 at the intersections of 59th Avenue Northeast and 211th Place Northeast, just west of Arlington. Adding compact roundabouts will reduce the risk of serious collisions at these intersections because drivers will no longer have to make turns across…

This project, located in Snohomish County includes paving along SR 530 between MP 35.37-36.78, 38.20-40.13, 42.53-48.65 as well as on several bridges along SR 530.

The asphalt on this stretch of SR 530 has outlived its anticipated lifespan. Through the years, cracks, ruts and…

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 three intersections to improve safety, travel times and reduce congestion.

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…

WSDOT will improve the intersection of SR 9 and SR 204 in Lake Stevens 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,…

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. It also…

In 2024, crews working for WSDOT will re-establish fish habitat in the Pilchuck River along State Route 92, just south of Sleepy Hollow Road, near Granite Falls. This project will replace large woody debris constructed as fish habitat in 2016, much of which has washed away. This project will use a…

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…