San Francisco Freeway & Road Rehabilitation
Upcoming Full Weekend Closures
Bridge Rehabilitation of Central (US 101) and Bayshore (I-80) Viaducts
- Friday thru Monday (4/10/2026 - 4/13/2026)
- 4th St Off ramp Full weekend closure (EB-80)
- Friday thru Monday (4/17/2026 - 4/20/2026)
- EB-80 Full closure (55 hour) from 17th St to 4th St.
Traffic Advisories
- March 19, 2026
Weekend Closure of EB I-80 Bayshore Freeway Between 17th & 4th streets 11 p.m. Friday April 17- 6 a.m. Monday April 20 - February 21, 2026
EB I-80 Bayshore Freeway 4th St. Off-ramp Reopens - February 13, 2026
Weekend Closure of EB I-80 Bayshore Freeway 4th St. Off-ramp Friday, February 20 to Monday, February 23
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 Projects
San Francisco-Oakland Bay Bridge Joint Rehabilitation Project
Project Schedule — through 2027
- Sunday (4/05/26) Night
- 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.)
- ON RAMP (1st Street ON RAMP) (11:00 p.m. to 7:00 a.m.)
- ON RAMP (Essex St ON RAMP) (11:59 p.m. to 7:00 a.m.)
- E/B 80 Lanes to close (West Span Joint Rehab Project)
Caltrans Maintenance
The affected days/times are:
- Friday (4/03/26) Night
- E/B 80 Lane to close (by Caltrans Maintenance)
- Lanes 2 and 3 (4th/Bryant to Rincon Hill) (10:00 p.m. to 6:00a.m.)
- Lanes 4 and 5 (From Rincon Hill ) (10:00 p.m. to 6:00a.m.)
- E/B 80 Lane to close (by Caltrans Maintenance)
- Monday (4/06/26) 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 a.m. to 4:30 p.m.)
- E/B 80 Lane to close (by Caltrans Maintenance)
Advisories
- March 11, 2026
San Francisco–Oakland Bay Bridge (SFOBB) West Span Joint Rehabilitation Project - Phase 2 Completed Phase 3 of Project Underway
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.
Advisories
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
Current Fab-4 Projects
19th Avenue Repaving, on SR-1
Image from work on the 19th Avenue Paving and Rehabilitation Project
Image of completed work on the 19th Avenue Paving and Rehabilitation Project
Advisories
- April 1, 2026
Update: Three weekend closures scheduled for 19th Avenue (State Route 1) Rehabilitation Project in City of San Francisco in Spring 2026 - March 24, 2026
Three weekend closures scheduled for 19th Avenue (State Route 1) Rehabilitation Project in City of San Francisco in Spring 2026 - November 10, 2025
19th Avenue (State Route 1) Rehabilitation Project Begins Monday, December 1
San Francisco US-101 (Hospital Curve) Rehabilitation — Construction Underway
- This work is weather dependent.
Advisories
- March 29, 2026
Caltrans Completes U.S. 101 Bayshore Freeway (Hospital Curve) Weekend Work Early, Ending Lane Reductions - March 19, 2026
U.S. 101 Bayshore Freeway (Hospital Curve) Lane Reductions and Repairs Scheduled for March 20–23 Canceled - March 15, 2026
U.S. 101 Bayshore Freeway (Hospital Curve) Lane Reduction Work Completed Ahead of Schedule - March 11, 2026
Weekend Lane Reductions on the U.S. 101 Bayshore Freeway (Hospital Curve), March 13-16, March 20-23, & April 3-6 - December 31, 2025
U.S. 101 Bayshore (Hospital Curve) and I-80 Lane Closures - January 5-10, 2026
Image of work on the San Francisco US-101 Rehabilitation Project
Bridge Rehabilitation of Central (US 101) and Bayshore (I-80) Viaducts — Construction Underway.
Upcoming Weekday Closures
Central/Bayshore Freeway Overnight Lane Closures
To support ongoing construction and safety improvements, overnight lane closures will continue through October 2026 on the Central/Bayshore Freeway. Work is scheduled nightly from 10:00 PM to 6:00 AM. During these hours, Lanes 1 and 2 between US 101 and the 4th Street/Bryant off ramp will be closed, leaving one lane open for traffic. Drivers should expect reduced speeds, possible delays, and shifting traffic patterns through the work zone.
Caltrans appreciates the public’s patience as crews work to maintain and improve Bay Area highways.
Upcoming Full Weekend Closures
- Friday thru Monday (4/10/2026 - 4/13/2026)
- 4th St Off ramp Full weekend closure (EB-80)
- Friday thru Monday (4/17/2026 - 4/20/2026)
- EB-80 Full closure (55 hour) from 17th St to 4th St.
Advisories
- March 19, 2026
Weekend Closure of EB I-80 Bayshore Freeway Between 17th & 4th streets 11 p.m. Friday April 17- 6 a.m. Monday April 20 - February 21, 2026
EB I-80 Bayshore Freeway 4th St. Off-ramp Reopens - February 13, 2026
Weekend Closure of EB I-80 Bayshore Freeway 4th St. Off-ramp Friday, February 20 to Monday, February 23 - February 4, 2026
Weekend Closure of EB I-80 Bayshore Freeway 4th St. Off-ramp Friday, February 20 to Monday, February 23 - January 21, 2026
Caltrans Begins Rehabilitating Central (U.S. 101) and Bayshore (Interstate 80) Viaducts
EB 80 Closure - 17th St to 4th Street Offramp
Upcoming Fab-4 projects:
- 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.
Connect With Caltrans District 4 On Social Media
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