Westbound traffic on the Richmond-San Rafael Bridge will shut down for nine hours Saturday night into Sunday morning so crews can install a new overhead toll gantry system, according to Caltrans.

Westbound Interstate 580 will be closed from 11 p.m. Saturday until 8 a.m. Sunday for the installation, which Caltrans says will make the Richmond-San Rafael Bridge the first state-owned bridge in the Bay Area to use overhead toll readers for open-road tolling.

Caltrans District 4 plans a complete closure of Westbound Interstate 580 (I-580) on the Richmond-San Rafael Bridge beginning at 11 p.m. on Saturday, Nov. 14, and continuing until 8 a.m. on Sunday, Nov. 15, 2026. Westbound I-580 will be closed beginning at
Canal Street and/or Castro Street. (Caltrans District 4 via Bay City News)

The bridge’s pedestrian and bike path will also be closed during those overnight hours.

Motorists are advised to expect delays and follow detour signs. Westbound traffic on I-580 from Richmond will be detoured to westbound state Route 37 and then southbound U.S. Highway 101 to get to the Marin County side of the bridge.

More information on work on the Richmond-San Rafael Bridge can be found the Caltrans website.

Dan McMenamin is the managing editor at Bay City News, directing daily news coverage of the 12-county greater Bay Area. He has worked for BCN since 2008 and has been managing editor since 2014 after previously serving as BCN’s San Francisco bureau reporter. A UC Davis graduate, he came to BCN after working for a newspaper and nonprofit in the Davis area. He handles staffing, including coaching of our interns, day-to-day coverage decisions and management of the newswire.