Revive I-5: Preserving the freeway

I-5 is Washington's busiest freeway

Built in the 1960s, Interstate 5 is Washington’s busiest freeway. Preserving this highway is an enormous undertaking that grows each year as the weather and billions of tires take a toll on pavement that is nearing the end of its useful life.

WSDOT is working to ensure that the interstate continues to perform at its best for as long as possible, preserving I-5 through regular inspections and preventative maintenance, along with months-long construction projects.


Completing this work will take several years. Managing traffic and congestion during pavement preservation work requires careful and coordinated planning that considers time of year, regional special events, changes to the transit system and other state or local road closures. Except for emergency repairs, all lane and ramp closures are carefully timed.

Current projects

Downtown Seattle

Mountlake Terrace to Lynnwood

Federal Way to Tukwila

Completed projects