Published on April 15, 2026
The Washington State Department of Transportation (WSDOT) will close Northbound I-405 from North Southport Drive/Northeast Sunset Boulevard (Exit 5) to Coal Creek Parkway Southeast (Exit 10) from 11:30 p.m. Friday, April 17 to 4 a.m. Monday, April 20.
Detour signs will be in place.
Crews with WSDOT will excavate drainage crossings, complete full pavement replacements, and perform a traffic switch as part of the I-405/Renton to Bellevue Widening and Express Toll Lanes Project. When complete, this project will extend the two-lane express toll system between Renton and Lynnwood.
Find other traffic impacts at rentonwa.gov/trafficmap.
Craig Smiley, I-405/SR 167 Program Communications
425-417-9658
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