Washington State Department of Transportation
Construction at the SR 99 tunnel’s future north portal will require traffic closures in December and January. Current information about these closures is below. We encourage travelers to plan ahead.
- Northbound lanes: Closed from 9 p.m. Friday, Dec. 18 to 5 p.m. Saturday, Dec. 19
- Southbound lanes: Closed from 9 p.m. Friday, Dec. 18 to 7 a.m. Saturday, Dec. 19. One southbound lane will remain closed until 1 p.m. Saturday, Dec. 19
Long-term lane closures beginning mid-January