WSDOT - Snohomish County Projects

This page lists current and future WSDOT highway improvement projects that are funded. To quickly find a project click on a route in the map below. To view projects that have been completed, visit our completed projects page.

Snohomish County Map

Snohomish County Projects

Between 2008 and 2020, WSDOT is investing more than $1.2 billion to improve highways in Snohomish County including I-5, US 2, SR 9, SR 522, SR 526, and SR 532.

Currently, crews are working to eliminate traffic choke points by:

widening I-5 through Everett
widening SR 9 north of Woodinville
building a park-and-ride facility in the I-5 median in South Everett
improving interchanges and intersections on SR 532 through Stanwood

In the next two years, we will:

Add rumble strips and high-visibility striping to US 2 between Monroe and Stevens Pass
Stabilize two hillsides on US 2 near Sunset Falls and Index
Widen nearly two miles of SR 9 south of Snohomish
Add new turn lanes and safety improvements on SR 9 in Marysville and Arlington
Repave sections of I-5, SR 528 and SR 526 to preserve these roadways and reduce costly repairs
Build a bus station in the I-5 median at 236th Street SW in Mountlake Terrace

Over the next 10 years, we will:

Improve seven intersections and widen several sections of SR 9
Replace the SR 529 Ebey Slough bridge in Everett
Build wider and longer on- and off-ramps on the SR 531 Smokey Point interchange near Marysville
Improve access and eliminate choke points on SR 532 between Stanwood and Camano Island
Widen SR 522 between the Snohomish River and US 2 in Monroe

US 2 (Also called Steven's Pass Highway)

US 2 Traffic Safety Corridor
WSDOT is joining forces with the Washington Traffic Safety Commission, the Washington State Patrol and local agencies on a community-led project that aims to reduce fatal and disabling collisions on US 2.
Contact: Communications Meghan Soptich 206-440-4704

US 2 - Corridor Rumble Strips - Safety
We will add centerline and shoulder rumble strips on US 2 between Monroe and just west of Stevens Pass to reduce cross-over collisions. We will also add permanent, high visibility striping and upgrade signs.
Estimated Total Project Cost: $4 million
Begin: May 2008
Estimated Completion: 2009
Contact: Project Engineer Dave Lindberg 425-814-7104

US 2 Sunset Falls Slide Slope Stabilization
Crews will work to stabilize the hillside and install a drainage system along US 2 to prevent landslides that could undermine the road.
Estimated Total Project Cost: $3.2 million
Begin Construction: Summer 2008
Estimated Completion: Late 2008
Contact:Project Engineer Dave Lindberg 425-814-7104

US 2 - One Mile East of Index - Slide Repair
Crews will permanently repair a section of eastbound US 2 damaged after heavy rain in November 2006.
Estimated Total Project Cost (permanent fix): $2.9 million
Begin Construction: Summer 2008
Estimated Completion: Late 2008
Contact:Project Engineer Dave Lindberg 425-814-7104

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Interstate 5

Mountlake Terrace: I-5 - Mountlake Terrace Freeway Station
We are working with Sound Transit on this project that will include on- and off-ramps from I-5 to a new transit bus stop (called an in-line flyer stop) with a pedestrian bridge. We will also retrofit the existing 236th Street SW bridge to bring it up to current seismic standards. Part of the funding for this project is provided by the 2005 Transportation Partnership Funding Package.
Estimated Total Project Cost: $27.8 million
Begin Construction: Spring 2009
Estimated Completion: Late 2010
Contact: Project Engineer, Chad Brown 206-716-1108

Lynnwood: I-5 / 52nd Ave SW to SR 526 - Northbound Paving
We will repave 9.2 miles of northbound I-5 between 52nd Ave W and SR 526. Funding for this project was provided by the 2003 Nickel Funding Package.
Estimated Total Project Cost: $6.9 million
Begin Construction: Summer 2009
Estimated Completion: Late 2009
Contact: Project Engineer Sharif Shaklawun 206-440-4272

Lynnwood: I-5 / 196th Street (SR 524) Interchange Southbound Braided Ramp
We will build two new southbound ramps on I-5 between the SR 525/I-405 interchange-ramp and the I-5/196th Street Southwest exit in Lynnwood. Funding for this project is provided by the 2005 Transportation Partnership Funding Package.
Estimated Total Project Cost: $55 million
Begin Construction: 2010
Estimated Completion: 2012
Contact: Project Engineer, Ghassan Sabboubeh 206-440-4959

Everett: I-5 / South Everett Freeway Station / 112th Street SE
This primarily Sound Transit-funded project will provide a 400-stall park-and-ride lot, bus stops, and HOV on and off-ramps in the I-5 median just north of 112th Street SE in south Everett. We will build a public access road so all drivers can reach the park-and-ride lot from 112th Street SE. We will also extend the northbound HOV lane up to the SR 526 / I-5 interchange and widen 112th Street SE.
Estimated Total Project Cost: $32 million
Begin Construction: September 2006
Estimated Completion: Late 2008
Contact: Project Engineer, Amir Ahmadi 425-225-8700

Everett: I-5 Everett Freeway Improvement & Expansion
I-5 - SR 526 to US 2 HOV Lanes and 41st Street extension
We will build carpool lanes in each direction on I-5 between SR 526 (the Boeing freeway) and US 2 (Hewitt Avenue Trestle). We will also modify the left-hand exit as a northbound HOV-only exit and southbound HOV-only on-ramp and build lanes in both directions, providing motorists with more space to merge when getting on or off the freeway between 41st Street and US 2.

We will widen the 41st Street under crossing and reconstruct the I-5/41st Street interchange ramps. The bridge over I-5 was demolished in April 2006 and was rebuilt to six lanes with a 12-foot sidewalk and bikeway. This project is projected to reduce collisions in the area by 50 percent. Funding for this portion of the project was provided by the 2005 Transportation Partnership Funding Package.
Estimated Total Project Cost: $263.4 million
Begin Construction: fall 2005
Complete Construction: summer 2008
Contact: For the 41st Street extension project, please contact Ryan Sass, City of Everett Traffic Engineer, at 425-257-8942 or Dave Davis, City of Everett Engineer, at 425-257-8913.

Everett: I-5 Snohomish River to Ebey Slough Paving
We will repave over four miles of northbound I-5 from the Snohomish River to the Ebey Slough Bridge near Everett.
Estimated Total Project Cost: $3.3 million
Begin Construction: Spring 2009
Estimated Completion: Late 2009
Contact: Project Engineer Gary McKee 206-440-4612

Marysville: I-5 - 116th Street Interchange
The Tulalip Tribes are designing improvements to the I-5/116th interchange in Marysville, which will be constructed in phases as funding is secured.
Begin Construction: 2008
Contact: Tulalip Tribes Senior Planner, Debra Bray 360-654-2608

Marysville: I-5 - Marysville to Stillaguamish River - Median Barrier
We will install concrete median barrier along a 10-mile strech of northbound I-5 in the Marysville area to reduce the risk of serious cross-median collisions involving southbound vehicles crossing into the northbound lanes. We willalso widen the existing shoulders to current standards.
Estimated Total Project Cost: $26.9 million
Begin Construction: Summer 2009
Estimated Completion: Late 2010
Contact: Project Engineer Hung Huynh 206-440-4311

Arlington: I-5 Arlington City Limit Vicinity to Stillaguamish River Bridge - Paving
We will pave almost four miles of southbound I-5 from SR 531 to the Stillaguamish River bridge, one mile of northbound I-5 near the Stillaguamish River bridge, the ramps to and from SR 530 to southbound I-5 and the northbound and southbound Smokey Point rest areas.
Estimated Total Project Cost: $4.5 million
Begin Construction: Spring 2009
Estimated Completion: Fall 2009
Contact: Project Engineer Hung Huynh 206-440-4311

Smokey Point: I-5 - 172nd Street (SR 531 Smokey Point) Interchange Improvements
In 2009, we will improve access at the Interstate 5 and State Route 531/172nd Street NE Interchange by building a new two lane loop ramp, adding turn lanes and widening existing ramps. Funding for this project is provided by the 2005 Transportation Partnership Funding Package.
Estimated Total Project Cost: $26.7 million
Begin Construction: 2009
Estimated Completion: 2010
Contact: Project Engineer, Sharif Shaklawun 206-440-4272

North of Stanwood: I-5 - SR 532 to Hill Ditch Bridge
We will smooth, grind and repave the northbound lanes on I-5 from SR 532 to Hill Ditch Bridge.
Estimated Total Project Cost: $9.3 million
Begin Construction: Spring 2009
Estimated Completion: Fall 2009
Contact: Project Engineer, Dawn Yankauskas 425-744-5403

I-5 Central King County to South Snohomish County Bridges - Seismic Retrofit
We will retrofit 19 existing bridges to bring them up to current seismic standards.
Estimated Total Project Cost: $12.6 million
Begin Construction: Fall 2008
Complete Construction: Summer 2010
Contact: Project Engineer, Amir Ahmadi, 425-225-8725

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SR 9

SR 9 Route Development Plan - SR 522 to Schloman Road Vicinity
We are studying SR 9 between SR 522 in Woodinville and Schloman Road in Arlington to develop a list of safety and congestion relief projects.
Estimated Total Project Cost: $1.5 million
Begin Study: March 2007
Estimated Completion: Late 2008
Contact: Project Manager Richard Warren, 206-464-1283

Clearview: SR9 - 212th SE to 176th SE (Stage 3) - Widening
We will double the number of through lanes on SR 9 and provide additional turn lanes at major intersections. We will also add a raised median to separate oncoming traffic and limit access points for turning drivers. These improvements will provide better driving conditions and improve safety on the highway.
Estimated Total Project Cost: $75 million
Begin Construction: Summer 2011
Estimated Completion: Summer 2013
Contact: Project Engineer, Sharif Shaklawun 206-440-4272

SR 9 - 176th Street to Marsh Road
We will widen SR 9 from two to four lanes between SR 96 and Marsh Road. We will upgrade four intersections by adding turn lanes, lights, curbs and gutters. We will also install a fiber optic line and traveler information cameras, and coordinate traffic signals. Funding for the project is provided by the 2005 Transportation Partnership Funding Package.
Estimated Total Project Cost: $53.4 million
Begin Construction: Summer 2008
Estimated Completion: Summer 2010
Contact: Project Engineer John Chi 425-489-5402

SR 9 - 20th Street SE
WSDOT is providing funding for Snohomish County to add turn lanes and widen the intersection at 20th Street SE and SR 9. The County will also upgrade the street lights and traffic signals at the intersection. For more information on Snohomish County's 20th Street SE Corridor Improvement Project, please visit their project Web page.
Estimated Total Project Cost:$12 million
Begin Construction: Summer 2008
Estimated Completion: Summer 2008
Contact: Snohomish County Project Manager, Matt Ojala 425-388-6647.

SR 9 - Lundeen Parkway to SR 92
We will widen SR 9 from Lundeen Parkway to SR 92 from two lanes to four. We will also add right-turn lanes in both directions at two intersections, upgrade the traffic signals at three intersections and improve lighting.
Estimated Total Project Cost: $34 million
Begin Construction: Summer 2010
Estimated Completion: Fall 2012
Contact: Project Engineer, Randy Frantz 206-440-4967

North of Marysville: SR 9 - Getchell Rd Bridge Seismic Retrofit
We will retrofit the Getchell Road Bridge on SR 9 to bring it up to current seismic standards.
Estimated Total Project Cost: $300,000
Begin Construction: Fall 2009
Estimated Completion: Late 2009
Contact: Project Engineer, Sharif Shaklawun 206-440-4272

North of Arlington: SR 9 - Schloman Rd. to 268th St. NE Safety Improvements
We will build wider 12 foot lanes and 4 foot shoulders for SR 9 along this section of roadway while realigning existing curves, flattening slopes, and improving safety features. This project also includes construction at the intersections of 268th Street NE and 252nd Street NE where we will construct left turn lanes on SR 9. We will also lower a hill to provide better sight distance for drivers. This project requires wetland mitigation, lighting improvements and hazardous waste removal.
Estimated Total Project Cost: $20.7 million
Begin Construction: Spring 2007
Estimated Completion: Fall 2008
Contact: Project Engineer, Marlin Lessen 425-225-8796

SR 9 - Pilchuck Creek Bridge
We will be replacing the existing bridge with a new bridge to meet current design standards for safety and capacity. Funding for this project is provided by the 2005 Transportation Partnership Funding Package.
Estimated Total Project Cost: $6 million
Begin Construction: 2011
Contact: Project Engineer, Tim Nau 206-440-4231

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