Northbound I-405 Weekend Closure: September 18-21
Published on September 14, 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, September 18 to 4 a.m. Monday, September 21.