Beaconians heading west from the Hill take note—The Seattle Department of Transportation (SDOT) will close the Spokane Street viaduct (formerly known as the West Seattle Freeway) overnight for three nights for work related to the Spokane Viaduct widening project.
Eastbound lanes of the viaduct will be closed from 11 p.m. tonight, February 25, until 5 a.m. on Saturday, February 26. The westbound lanes of the viaduct will be closed overnight on February 27 and 28 from 10 p.m. until 5 a.m. the following day to remove portions of the old structure. During this closure, southbound I-5 traffic will be directed to the Forest Street exit to access surface streets. Northbound I-5 traffic and westbound traffic from Columbian Way will be detoured to surface streets at 6th Avenue South.
You can see more information about the project at the Spokane Street Viaduct Widening Project page.