San Francisco Freeway & Road Rehabilitation
Exciting changes are underway on San Francisco’s roads and freeways, specifically on the I-280, the U.S. 101 Hospital Curve, the Central Freeway, and SR-1 (19th Avenue). We call them the Fab 4! Each project is receiving 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 is progressing on the U.S. 101 Hospital Curve of the Bayshore freeway, and on the U.S. 101 Central freeway. The I-280 Farallones pedestrian overcrossing and rehabilitation work begins in Summer 2026. And the 19th Avenue rehabilitation is near completion!
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: Upcoming Lane and Ramp Closures
SUNDAY 08/02/2026 — NIGHT
Westbound I 80:
Lane 3 — SAS Tower → SFOBB Tower 2 (W 2) — 11:00 PM to 4:00 AM
Lane 4 — SAS Tower → SFOBB Tower 2 (W 2) — 9:00 PM to 5:00 AM
Lane 5 — SAS Tower → SFOBB Tower 2 (W 2) — 9:00 PM to 5:00 AM
SUNDAY 08/02/2026 — NIGHT
Eastbound I 80:
Lane 1 — SF Anchorage Rincon Hill → Yerba Buena Island Tunnel — 10:00 PM to 7:00 AM
Lane 2 — SF Anchorage Rincon Hill → Yerba Buena Island Tunnel — 11:00 PM to 7:00 AM
Lane 3 — SF Anchorage Rincon Hill → Yerba Buena Island Tunnel — 12:00 AM to 6:00 AM
Lane 4 — SF Anchorage Rincon Hill → Yerba Buena Island Tunnel — 1:00 AM to 5:00 AM
MONDAY 08/03/2026 — DAYTIME
Eastbound I 80:
Lane 1 — SFOBB Pier 1 (W 1) → Yerba Buena Island Tunnel — 7:00 AM to 2:00 PM
San Francisco-Oakland Bay Bridge Joint Rehabilitation Project*
Project Schedule — through 2027
*Motorists should expect lane closures occurring overnight on the EB I-80 San Francisco-Oakland Bay Bridge throughout the project. Closures will usually start with closing one lane at 10:00 pm., two lanes at 11:00 p.m., and three lanes at midnight. With a few exceptions when work is delayed or postponed for major local event traffic, lane closures will be in effect from Sunday to Thursday nights.
Advisories
- May 7, 2026
San Francisco–Oakland Bay Bridge (SFOBB) East Span Lane Reductions Scheduled Tonight Thursday May 7, at 10:00 p.m. - Friday May 8, at 6 :00 a.m. - 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-Oakland Bay Bridge Structural Steel Painting & Spall Repairs
Project Schedule — through Spring 2031
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
- July 31, 2026
Nightly Lane Closures for Paving at California Street/Park Presidio Intersection as Part of 19th Avenue Rehab. Project in San Francisco - June 5, 2026
Nightly Lane Closures for Striping, Electrical Work as part of 19th Avenue Rehabilitation Project in City of San Francisco - May 25, 2026
Third Weekend Closure Concludes for 19th Avenue Rehabilitation Project in City of San Francisco on Monday, May 25 - May 15, 2026
Third of Three Weekend Closures Scheduled for 19th Avenue (State Route 1) Rehabilitation Project in City of San Francisco - May 7, 2026
Reminder: Second of Three Weekend Closures Scheduled for 19th Avenue (State Route 1) Rehabilitation Project in City of San Francisco - May 4, 2026
Second of Three Weekend Closures Scheduled for 19th Avenue (State Route 1) Rehabilitation Project in City of San Francisco - April 27, 2026
First Weekend Closure Finishes Ahead of Schedule for 19th Avenue Rehabilitation Project in City of San Francisco on Monday, April 27 - April 17, 2026
Three weekend closures scheduled for 19th Avenue (State Route 1) Rehabilitation Project in City of San Francisco in Spring 2026 - April 7, 2026
Revised: Three weekend closures scheduled for 19th Avenue (State Route 1) Rehabilitation Project in City of San Francisco in Spring 2026 - 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
- June 3, 2026
U.S. 101 Bayshore Freeway (Hospital Curve), Overnight Median Barrier Work Continues Tuesday, June 2 - Tuesday, June 9 - May 11, 2026
U.S. 101 Bayshore Freeway (Hospital Curve), Overnight Median Barrier Work Rescheduled Tuesday, May 19 - Friday, May 22 - 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 Lane and Ramp 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 p.m. to 6:00 a.m.
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.
Check back for the latest lane closures.
Caltrans appreciates the public’s patience as crews work to maintain and improve Bay Area highways.
Advisories
- April 16, 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 - April 14, 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 - April 7, 2026
EB I-80 Bayshore Freeway 4th St. Off Ramp Closure Scheduled for April 10-13 Canceled - 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
I-280 Farallones Street Pedestrian Overcrossing and Rehabilitation Project
Public Meeting Information
Future meetings to be scheduled
FAQ
Here’s a copy of our project’s FAQ sheet, created so you can easily save or reference the key information whenever you need it. If you’d like to download or view the full fact sheet, please click the link below.
- I-280 Farallones Street Pedestrian Overcrossing Rehabilitation Project Fact Sheet - EN
- I-280 Proyecto de Rehabilitación del Puente Peatonal de la calle Farallones - ES
- Proyekto sa Rehabilitasyon ng I-280 Farallones Street Pedestrian Overcrossing - FIL
- Dự án Cải tạo Cầu vượt Dành cho Người đi bộ Farallones Street trên tuyến I-280 - VI
- 人行天桥改造项目。- ZH
Upcoming Lane and Ramp Closures
Week of July 13
NB I-280 Nightly Lane closures at 10:00 p.m. – 5:00 a.m. between Daly City Blvd. and Geneva Ave.
SB I-280 Nightly Lane closures at 11:00 p.m. – 6:00 a.m. between Daly City Blvd. and Geneva Ave.
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
#CaltransLovestheBay
