Transportation officials are recommending drivers take the I-90 bridge across Lake Washington instead.
A crash that left one car wedged under another and pushed the center barrier into a traffic lane brought the Highway 520 bridge commute to its knees Wednesday morning.
All lanes are back open, but delays could linger for a while.
Backups stretched to Interstate 405 for westbound travelers and to Interstate 5 (and up and down I-5 through Seattle leading toward 520) for eastbound travelers.
The state and city transportation departments recommended drivers take the I-90 bridge across Lake Washington instead.
An incident-response team started pushing the barrier back into place at about 8:45 a.m. and all lanes reopened about 40 minutes later, according to the Washington State Department of Transportation.
This post will be updated.