Caltrans has announced a series of major weekend closures impacting a roughly two-mile stretch of Highway 101 in San Francisco. Spanning four upcoming weekends this fall, these 55-hour disruptions are expected to push heavy traffic onto parallel surface streets like Potrero Avenue and alternate routes such as Interstate 280, potentially causing significant delays for local motorists.
Project Scope and Objectives:
The construction focuses on the Bayshore Freeway section known as the “Hospital Curve,” located between Cesar Chavez Street and 10th Street. Crews will completely shut down traffic in one direction at a time to execute major repaving and surface rehabilitation work. This effort mirrors a similar paving project completed earlier this year on 19th Avenue.
In addition to paving, Caltrans recently finished preliminary infrastructure improvements on Monday morning, installing an updated drainage system. Officials prioritized this early work to prevent potential flooding, keeping in mind meteorologists’ forecasts pointing toward a particularly powerful El Niño season this winter.
Closure Schedule
The multi-weekend operation is split between northbound and southbound directions:
Northbound Closures:
September 4–7 (Labor Day weekend)
September 18–21
Timing: Begins Friday at 11:00 PM and scheduled to reopen Monday by 6:00 AM.
Southbound Closures:
October 2–4
October 17 onward
Timing: Each closure lasts for 55 hours starting Fridays.
Traffic Diversions and Preparation
Caltrans representatives emphasize that drivers should avoid the construction zone entirely if possible. For northbound commuters, recommended alternatives include utilizing Interstate 280 toward the Bay Bridge or exiting at Cesar Chavez Street to navigate via Potrero Avenue through the Mission district toward downtown.
Agency officials have actively coordinated with the local community ahead of the shutdowns. Outreach efforts included canvassing the Mission district to brief residents, local businesses, and the Zuckerberg San Francisco General Hospital and Trauma Center regarding the anticipated surge on Potrero Avenue, alongside coordinating with emergency services. Caltrans also presented project details at a recent Kansas Street Neighborhood Association meeting.
Furthermore, organizers have planned around major local events. Because a closure falls on September 19 when the Golden State Valkyries are scheduled to play the Seattle Storm at the Chase Center Caltrans coordinated directly with the arena to manage anticipated event traffic along the I-280 corridor.
Timing Justification:
Although the initial closure coincides with Labor Day weekend a period traditionally marked by heavy regional travel Caltrans defends the scheduling. Officials noted that holding the work during a holiday weekend avoids standard weekday commuter congestion. Additionally, favorable summer weather conditions are essential, as the paving materials require a dry environment free of moisture and rain to cure safely and properly.
