5:42 PM: With the Alaskan Way Viaduct out of commission this weekend, the exits on the Spokane Street Viaduct – east half of the West Seattle Bridge – are carrying more traffic. That might be complicating matters now that there’s a four-car crash near the 4th Avenue South exit. Big backup on the bridge, according to the nearest cam:
(“Live” views are on the WSB Traffic page.)
5:53 PM: Multiple lanes are closed and an officer was just heard (via scanner) saying they’ll be closed “a while.
7:12 PM UPDATE: SDOT has tweeted that the scene is clear.