San Francisco Freeway & Road Rehabilitation
Click for Fab 4 details
Exciting changes are underway on San Francisco’s roads and freeways, specifically on I-280, the U.S. 101 Hospital Curve, the Central Freeway, and SR-1 (19th Avenue). We call them the Fab 4! Each project will receive major repaving and rehabilitation, helping create safer, smoother driving experiences for everyone who drives to, from, and in and around the San Francisco Bay Area. Work has just begun on the U.S. 101 Hospital Curve of the Bayshore freeway, and on SR-1 (19th Avenue). The U.S. 101 Central freeway and SR-1 (19th Avenue) projects begin in Spring 2026 and Summer 2026, respectively.
These rehabilitation projects will provide extensive repairs and upgrades to restore the structural integrity and enhance the safety of San Francisco’s most used freeways by motorists, where approximately 44,900 people travel daily.
To learn more about these projects, visit Welcome to the Fab-4 Rehabilitation Projects Toolkit | Caltrans.
Current
San Francisco-Oakland Bay Bridge Joint Rehabilitation Project
The San Francisco Striping and Signage Project on I-280, I-80 and US-101
These ramp closures on I-280 are the first of several ramp closures required on I-80, and US-101 to allow crews to safely install new roadway striping and reflective signage. This effort is a safety project to prevent wrong-way drivers from entering freeways.
19th Avenue Repaving, on SR-1
San Francisco US-101 (Hospital Curve) Rehabilitation
- December 31, 2025
U.S. 101 Bayshore (Hospital Curve) and I-80 Lane Closures - January 5-10, 2026 - December 30, 2025
U.S. 101 (Hospital Curve) Overnight Ramp Closures - January 5 – January 9, 2026 - December 23, 2025
U.S. 101 (Hospital Curve) Overnight Ramp Closures – San Francisco - October 15, 2025
Caltrans to Begin U.S. 101 (Hospital Curve) Rehabilitation
Bridge Rehabilitation of Central (US 101) and Bayshore (I-80) Viaducts
- January 21, 2026
Caltrans Begins Rehabilitating Central (U.S. 101) and Bayshore (Interstate 80) Viaducts
Completed Projects
San Francisco County Completed Projects (from 2024 to present)
Current Project Details:
- San Francisco-Oakland Bay Bridge Joint Rehabilitation Project — through 2027
Project schedule:- Friday (1/23/26) Night to Saturday (1/24/26) Daytime
- W/B 80 Lanes to close (Baylights Project)
- Lane 5 (Treasure Island to Rincon Hill) (9:00 p.m. to 7:00 a.m.)
- Lane 4 (Treasure Island to Rincon Hill) (11:00 p.m. to 5:00 a.m.)
- W/B 80 Lanes to close (Baylights Project)
- Saturday (1/24/26) Night to Sunday (1/25/26) Daytime
- W/B 80 Lane to close (Caltrans maintenance)
- Lane 1 (Off Ramp to 5th and Harrison) (10:00 p.m. to 6:00 a.m.)
- W/B 80 Lane to close (Caltrans maintenance)
- Sunday (1/25/26) Night to Monday (1/26/26) Daytime
- E/B 80 Lanes to close (West Span Joint Rehab Project)
- Lanes 1 and 2 (Rincon Hill to Yerba Buena Island) (11:00 p.m. to 7:00 a.m.)
- Lane 3 (Rincon Hill to Yerba Buena Island) (11:59 p.m. to 7:00 a.m.)
- E/B 80 Lanes to close (West Span Joint Rehab Project)
- Monday (1/26/26) Daytime
- E/B 80 Lane to close (by Caltrans Maintenance)
- Lane 1 (To Yerba Buena Island Tunnel) (7:00 a.m.to 2:00 p.m.)
- W/B 80 Lane to close (by Caltrans Maintenance)
- Right Shoulder (Ala/SF County Line) (11:00 am. to 3:30 p.m.)
- E/B 80 Lane to close (by Caltrans Maintenance)
- Friday (1/23/26) Night to Saturday (1/24/26) Daytime
- San Francisco US-101 (Hospital Curve) Rehabilitation — Construction Underway.
Ramp closure schedule:- This work is weather dependent.
- Bridge Rehabilitation of Central (US 101) and Bayshore (I-80) Viaducts — Construction Underway.
Ramp closure schedule:- Friday (1/23/26) Daytime – Saturday 1/24/26
- W/B 80 Lanes to close (Central and Bayshore Project)
- Lanes 2 and 3 (Connector 101 SB to EB on 5th/Bryant) (11:59 p.m. -8:00 a.m)
- W/B 80 Lanes to close (Central and Bayshore Project)
- Friday (1/23/26) Daytime – Saturday 1/24/26
Caltrans has launched a major effort to revitalize San Francisco’s most used roads and freeways. We refer to them as the Fab-4 Rehab projects which will create safer and smoother driving experiences in and around San Francisco. Two of these projects are taking place along the Bayshore and Central freeways US-101 and I-80. A third project will be the repaving of the entire 19th Avenue (SR-1) between the Golden Gate Park and San Francisco State University. And the fourth project is the rebuilding of an outdated pedestrian overcrossing on the I-280 near Cayuga Park.
Please read more below about each project. Visit here to learn more about these four important projects: Welcome to the Fab-4 Rehabilitation Projects Toolkit | Caltrans
Upcoming projects:
- Bridge Rehabilitation of Central (US 101) and Bayshore (I-80) Viaducts — begins Winter 2026.
- The Farallones Street Pedestrian Overcrossing Project, on I-280 — begins Spring 2026.
Project Media Gallery
Emergency Barrier Repairs, US-101 & US-80
Additional project resources including downloadable maps, image galleries, and video clips can be found on the Emergency Barrier Repair Project Media Resources Page.
San Francisco-Oakland Bay Bridge Joint Rehabilitation Project
Additional project resources including downloadable maps, image galleries, and video clips can be found on the San Francisco-Oakland Bay Bridge Joint Rehabilitation Project Media Resources Page.
Contact
For real-time traffic, click on Caltrans QuickMap: https://quickmap.dot.ca.gov/
For 24/7 traffic updates, follow 511.org: https://x.com/511SFBay
For more information contact:
Lori Shepherd
Public Information Officer
San Francisco County CALTRANS - District 4
Thank you for your patience as we work to improve our roads and infrastructure.
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