Westbound Bay Bridge set for weekend closure SAN FRANCISCO (AP) — San Francisco residents getting out of town for the long holiday weekend will want to plan ahead for the closure of one direction of the San Francisco-Oakland Bay Bridge. The closure of the westbound lanes of the bridge — which could have been delayed if rain moved into the area — is set for 8 p.m. Friday. The roadway will be closed so crews can work on reconfiguring lanes on the upper deck, as well as paving and painting lanes.