Northbound & Southbound Lanes Closed between Cesar Chavez St. to 17th St.
San Francisco County ― Caltrans will reduce lanes along the SB & NB U.S. 101 Bayshore Freeway (Hospital Curve) in the city of San Francisco for the entire weekend of August 21-24, to complete crucial median road work as part of the Fab 4 Hospital Curve Rehabilitation projects which began in Fall 2025.
Lane reductions will begin Friday August 21, at 11 p.m. when two northbound lanes and two southbound lanes between Cesar Chavez to 17th street will be closed. These lanes will reopen by Monday August 24, at 6 a.m. During the weekend, two lanes in the northbound and two in the southbound lanes will remain open to the traveling public. Motorists are advised to avoid driving NB and SB U.S. 101 Bayshore Freeway (Hospital Curve).
Motorists should use the I-280 as an alternate route traveling southbound to the peninsula and south bay and traveling northbound to downtown, or to the San Francisco Oakland Bay Bridge, to avoid the work zone and traffic delays. Public transportation should be seriously considered in place of driving.
Other Important Closure (this September) Dates to Remember
Looking ahead, motorists can expect a series of full freeway closures along the U.S. 101 Bayshore (Hospital Curve) where the freeway will be entirely closed to traffic between Cesar Chavez to 17th to continue the necessary road work.
Full Freeway Closures
- September 4-7 (Labor Day Weekend): NB Cesar Chavez to 17th St.
- September 18-21: NB Cesar Chavez to 17th St.
Detour Map for Motorists Traveling to and from San Francisco Airport and Rental Car Center, the Peninsula and the South Bay
A dedicated detour map has been prepared for travelers departing from and to the San Francisco International Airport (SFO) and the SFO Rental Car Center, as well as for motorists coming from the peninsula and the South Bay who are heading toward the San Francisco–Oakland Bay Bridge and/or San Francisco destinations.
The map illustrates the preferred routing during the weekend closure.
Driver and Community Benefits
Once complete, the project will:
- Preserve and extend the life of the freeway corridor
- Improve ride quality and driving comfort
- Enhance overall freeway safety
Stay Informed
For the latest updates visit sfhighwayprojects.com where Caltrans will continue to provide updates as schedules are confirmed. Motorists should check back regularly for the latest construction information, traffic impacts, and detour details.
All work is weather dependent. Please drive with caution. Thank you for your patience as we work to maintain our state’s highways, bridges, and tunnels.
For real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/
Caltrans appreciates the public’s patience and cooperation as we work to maintain and improve California’s transportation infrastructure.