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To improve mobility on I-5 through Seattle, we will move barrier on a 1,500-foot section to create three through lanes near Seneca Street, add ramp meters for the Dearborn/I-90 and Cherry Street on-ramps and extend the Active Traffic and Demand Management system north to SR 520.

This project widened northbound I-5 from Portland Avenue to the Port of Tacoma Road to provide room for one HOV lane. As part of this project, WSDOT rebuilt the northbound I-5 Puyallup River bridge and the ramp to northbound SR 167, improved the Portland Avenue interchange, and repaved a portion of…

This project replaced the 1965 southbound I-5 Puyallup River Bridge. The new bridge is built to current seismic standards and will be straighter and wider than the previous bridge.

The project also modified the Port of Tacoma Road on-ramp to southbound I-5, demolished the existing…

Beginning in summer 2021, contractor crews rehabilitated a nearly two mile stretch of southbound Interstate 5, just south of Woodland, WA in Clark county. Sections of the interstate were showing signs of wear and tear. There were cracks, ruts and potholes in many places along the highway. The…

This two-year rehabilitation project replaced 56 expansion joints and repaved 1.25 miles of southbound I-5 between I-90 and Spokane Street. This project is one of dozens that make up Revive I-5, which will rehabilitate the I-5 corridor in the King County area in the next 10 years.

The Stillaguamish River Bridge was in need of new paint to preserve and protect its aging structure. Existing paint on the southbound I-5 bridge was weathered and damaged, allowing corrosion to occur. This bridge preservation project removed old peeling paint, cleaned exposed metal and applied new…

WSDOT is starting work on a project to improve the Slater Road corridor north of Bellingham, between Rural Avenue, west of I-5, and Northwest Drive, east of I-5.

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.

To increase safety, improve mobility and reduce congestion, WSDOT rebuilt the entire I-5/SR 16 Nalley Valley interchange.

Reconstruction of the interchange was staged to keep people and goods moving. The first two stages of work rebuilt the westbound and eastbound Nalley Valley…

The Tacoma/Pierce County HOV Program is a series of projects, spanning over 20 years, that build high-occupancy-vehicle (HOV) lanes on I-5, SR 16 and SR 167 in Pierce County.

This project has been suspended. There is no timeline for when it may resume.

Crews reconfigured the Marvin Road overpass to create a diverging diamond interchange. The rebuilt interchange is intended to help ease congestion and reduce the potential for crashes. The project was constructed ahead of planned major development in Lacey north of I-5.

A diverging…

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…

To relieve chronic traffic congestion and improve mobility along Interstate 5 in the vicinity of Joint Base Lewis-McChord, WSDOT is rebuilding the interchanges at Thorne Lane and Berkeley Street and adding lanes to I-5. Once construction is finished, the new lane in each direction on I-5 will open…

The Horseshoe Lake pump station located along Interstate 5 near the City of Woodland in Cowlitz County is a water intake and pump system that moves water from the Lewis River into Horseshoe Lake. The pump keeps water flowing between the lake and the Lewis River and helps maintain water quality in…

WSDOT will construct this project through the design build process, removing two fish barriers, one under SR 11 at 30th Street, the other under Interstate 5, south of the SR11/Old Fairhaven Parkway on- and off-ramps and replacing them with fish passable structures. Additional improvements will be…

The purpose of this project is to remove and replace the northbound span of the I-5 East Fork Lewis River located at milepost 18.21, approximately 3 miles south of Woodland near the Clark and Cowlitz County lines. The existing bridge also crosses over the Paradise Point State Park day use area and…

This project replaced the existing sign bridge on southbound Interstate 5 at Kincaid Street (exit 226) in Mount Vernon that was previously damaged.

This project began with a federal Planning and Environmental Linkages (PEL) study focused on I-5 from Marvin Road to Mounts Road. The National Environmental Policy Act (NEPA) environmental review will start in 2023.

This next phase will study I-5 from Marvin Road to Mounts Road (Exit…

This project includes repairing the bridge deck, modifying expansion joints and installing a polyester concrete overlay on both I-5 northbound and southbound bridges over the North Fork Lewis River. Once complete, travelers will experience a smoother, safer driving surface and the commercial…

Along a 12-mile stretch of southbound Interstate 5 in Whatcom and Skagit counties between milepost 243 just north of Nulle Road to milepost 231 near the State Route 11/Chuckanut Drive interchange the pavement is worn and there are cracks, ruts and potholes along the highway. Included in this…

This preservation project will replace the top portion of the deteriorating bridge deck of the Samish River Bridge located on I-5 southbound at milepost 234. Crews will replace the worn surface with a new polyester deck overlay. The paved panel joint seals will also be replaced.

In summer 2024, contractor crews will begin work to improve the southbound lanes of the I-5 Dike Access Road Bridge that spans over Dike Access Road and the railroad bridge, just north of Woodland, in Cowlitz County, WA.

On Sunday, Nov. 14, 2021, an over height load was traveling northbound on I-5 when it struck and damaged the northbound span of Koontz Road overpass, located between milepost 69.35-69.48, in Lewis County.

Following the bridge strike, WSDOT bridge crews assessed the damage and…

We will rehabilitate both directions of Interstate 5 between the Duwamish River and Lucile Street in Seattle. To do this, we will replace some of the panels, grind the highway to eliminate high spots and repair the expansion joints on the northbound and southbound I-5 overpasses above Military Road…

In summer 2022 and 2023, WSDOT's contractor, Granite Construction, replaced roughly 100 concrete panels along both directions of I-205 between the Glenn Jackson Bridge near the SR 14 interchange and the I-5/I-205 split and along southbound I-5 between Northeast 179th Street and the I-5/I-205…

In summer 2023, WSDOT contractor crews will install new ramp meters at several on-ramps along northbound Interstate 5 and southbound Interstate 205 in Clark County.

Ramp meters, a type of traffic signal, are employed to regulate the rate at which vehicles enter the freeway, serving…

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.

Three culverts below Interstate…

During fall 2022, contractor crews replaced the damaged girder on the 12th Street Bridge over Interstate 5 between Everett and Marysville. In addition to replacing the girder, part of the bridge deck and barrier were rebuilt.

We rehabilitated more than 3 miles of pavement, replacing broken panels and grinding the surface to eliminate ruts worn by decades of vehicles. In addition, we replaced expansion joints on four bridges. This project was combined with another rehabilitation project on I-90 to reduce costs.