San Francisco Freeway & Road Rehabilitation

US-101 Central and Viaducts Rehabilitation

San Francisco-Oakland Bay Bridge Joint Rehabilitation

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.

Photo of San Francisco buildings form the skyline.

Current Projects

San Francisco-Oakland Bay Bridge Joint Rehabilitation Project

Project Schedule — through 2027
- Friday (1/30/26) Night to Saturday (1/31/26) 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.) (Treasure Island to Rincon Hill) (11:00 p.m. to 5:00 a.m.)
- Sunday (2/1/26) Night to Monday (2/2/26) 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.)
- Monday (2/2/26) Daytime
  - W/B 80 lane to close (Caltrans Maintenance)
    - Right Shoulder (Alameda/San Francisco County Line) (11:00 a.m. to 3:30 p.m.)
  - 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.)

Advisories

San Francisco-Oakland Bay Bridge Western Span Rehabilitation Project Underway
Overnight lane closures planned as crews begin bridge joint construction work

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

San Francisco Overnight Freeway Off-Ramp Closures on I-80, US-101, and I-280, to Install Safety Equipment

Map showing locations of San Francisco Central Freeway Rehabilitation projects.

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

19th Avenue (State Route 1) Rehabilitation Project Begins Monday, December 1

San Francisco US-101 (Hospital Curve) Rehabilitation — Construction Underway

Caltrans cutting concrete on US 101 as part of the U.S. 101 (Hospital Curve) Rehabilitation Project.
_{Image of work on the San Francisco US-101 Rehabilitation Project}

This work is weather dependent.
- Friday thru Monday (3/6/2026 - 3/9/2026)
  - 101 NB & SB 2 fast lanes in Seg 1 (1st of 3 closures)
    From Candlestick Park to Silver Ave
- Friday thru Monday (3/13/2026 - 3/16/2026)
  - 101 NB & SB 2 fast lanes in Seg 1 (2nd of 3)
    From Candlestick Park to Silver Ave
- Friday thru Monday (3/20/2026 - 3/23/2026)
  - 101 NB & SB 2 fast lanes in Seg 1 (3rd of 3)
    From Candlestick Park to Silver Ave
- Saturday thru Sunday (3/28/2026 - 3/29/2026)
  - EB-80 Full from 17^th St to 4^th St.

Advisories

December 31, 2025
U.S. 101 Bayshore (Hospital Curve) and I-80 Lane Closures - January 5-10, 2026

Bridge Rehabilitation of Central (US 101) and Bayshore (I-80) Viaducts — Construction Underway.

Upcoming Weekday Closures
- Friday (1/30/26) Night to Saturday (1/31/26) Daytime
  - E/B 80 Lane to close (Central and Bayshore Project)
    - Lanes 2 and 3 (101 to Off Ramp 4^th/Bryant) (11:59 p.m. to 8:00 a.m.)
  - E/B 80 Ramp to close (Central and Bayshore Project)
    - On Ramp (8^th /Bryant On Ramp) (11:00 p.m. to 10:00 a.m.)
  - W/B 80 Connector to close (Central and Bayshore Project)
    - Connector (WB 80 to NB Connector to 101 NB) (11:59 p.m. to 6:00 a.m.)
- Saturday (1/31/26) Night to Sunday (2/1/26) Daytime
  - E/B 80 Lanes to close (Central and Bayshore Project)
    - Lanes 1 and 2 (101 to Off ramp 4^th/Bryant) (11:59 p.m. to 8:00 a.m.)
  - W/B 80 Lanes to close (Central and Bayshore Project)
    - Lanes 1 and 2 (Off to 4^th/Bryant to 101) (11:59 p.m. to 8:00 a.m.)

Upcoming Full Weekend Closures
- Friday thru Monday (2/20/2026 - 2/23/2026)
  - 4^th St Offramp Full (EB-80) - Weekend Closure
- Saturday thru Sunday (3/28/2026 - 3/29/2026)
  - EB-80 Full weekend closure from 17th St. to 4^th St. - 12-hour closure
- Friday thru Monday (4/10/2026 - 4/13/2026)
  - 4^th St Offramp Full weekend closure (EB-80)
- Friday thru Monday (4/17/2026 - 4/20/2026)
  - EB-80 Full closure (55 hour) from 17^th St to 4^th St.

Advisories

January 21, 2026
Caltrans Begins Rehabilitating Central (U.S. 101) and Bayshore (Interstate 80) Viaducts

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.

Completed Projects

San Francisco County Completed Projects (from 2024 to present)

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

San Francisco Freeway & Road Rehabilitation

Current Projects

San Francisco-Oakland Bay Bridge Joint Rehabilitation Project

Advisories

The San Francisco Striping and Signage Project on I-280, I-80 and US-101

Advisories

Current Fab-4 Projects

19th Avenue Repaving, on SR-1

Advisories

San Francisco US-101 (Hospital Curve) Rehabilitation — Construction Underway

Advisories

Bridge Rehabilitation of Central (US 101) and Bayshore (I-80) Viaducts — Construction Underway.

Upcoming Weekday Closures

Upcoming Full Weekend Closures

Advisories

Upcoming Fab-4 projects:

Project Media Gallery

Emergency Barrier Repairs, US-101 & US-80

San Francisco-Oakland Bay Bridge Joint Rehabilitation Project

Completed Projects

Contact

Thank you for your patience as we work to improve our roads and infrastructure.

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