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San Francisco Freeway & Road Rehabilitation

Upcoming Full Weekend Closures

19th Avenue Repaving, on SR-1

  • 75-hour closure: Friday, May 22 from 7 a.m. until Monday, May 25 at 10 a.m. on Southbound/Northbound 19th Avenue from Sloat Boulevard to Holloway Avenue

Parking on 19th Avenue will be restricted to work zones during weekend closures; parking is permitted on side streets.

Even though one lane will always remain open to traffic while repaving is underway, motorists are encouraged to use alternative routes.

Daytime Alternate Route: Northbound

  • Steer right on Junipero Serra Boulevard
  • Left on Sloat Boulevard

Nighttime Alternate Route: Northbound

  • Steer right on Junipero Serra Boulevard
  • Left on Sloat Boulevard

Nighttime Alternate Route: Southbound

  • Left on Sloat Boulevard
  • Right on Junipero Serra Boulevard

Daytime detour map for the closure of northbound 19th Avenue between Holloway Ave and Sloat Blvd. Motorists traveling northbound on 19th Avenue should steer right onto Junipero Serra Blvd before turning left on Sloat Blvd to return to19th Avenue.

Nighttime detour map for the closure of 19th Avenue between Holloway Ave and Sloat Blvd. Motorists traveling northbound on 19th Avenue should steer right onto Junipero Serra Blvd before turning left on Sloat Blvd to return to19th Avenue. Motorists traveling southbound on 19th Avenue should turn left onto Sloat Blvd and then turn right onto Junipero Serra Blvd to get back to 19th Avenue.

 

Traffic Advisories

For downable resources for this project, please visit:

19th Avenue Paving and Rehabilitation Media Resources | Caltrans

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

  • Wednesday (5/13/26) 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 (Essex Street ON RAMP) (11:59 p.m. to 7:00 a.m.)
      • ON RAMP (1st Street ON RAMP) (11:59 p.m. to 7:00 a.m.)

Caltrans Maintenance
The affected days/times are:

  • Thursday (5/14/26) 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.)
Caltrans working on the San Francisco Bay Bridge for the San Francisco-Oakland Bay Bridge Joint Rehabilitation Project.
 

Advisories

Banner image for the San Francisco freeway rehabilitation projects, four will rehabilitate San Francisco’s major freeway arteries, referred to as the Fab 4 Rehab projects. The Fab 4 includes the Bayshore and Central freeways US-101 and I-80, the entire 19th Avenue (SR-1), and the pedestrian overcrossing on the I-280 near Cayuga Park

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

Caltrans pouring concrete as work continues on the19th Avenue Paving and Rehabilitation project.
Image from work on the 19th Avenue Paving and Rehabilitation Project

Cars on 19th Avenue traffic as Caltrans continues the19th Avenue Paving and Rehabilitation project.
Image of completed work on the 19th Avenue Paving and Rehabilitation Project

 

Upcoming Closures

Three weekend closures are needed to finish the second phase of this project. Organizing the work in three weekend closures will reduce impact on the public from 40 to 10 days.

Organizing the work in three weekend closures will reduce impact on the public from 40 to nine days. For all three closures, two lanes are scheduled to be fully closed with one lane open for public transit, emergency responders and local access.

For all three closures, two lanes are scheduled to be fully closed with one lane open for public transit, emergency responders and local access.

The revised schedule is as follows:

  • 74-hour closure: Friday, May 8 from 3 a.m. until Monday, May 11 at 5 a.m. on Southbound 19th Avenue from Lincoln Way to Sloat Boulevard
  • 75-hour closure: Friday, May 22 from 7 a.m. until Monday, May 25 at 10 a.m. on Southbound/Northbound 19th Avenue from Sloat Boulevard to Holloway Avenue

The second phase of the project includes resurfacing the existing asphalt pavement on SR-1 from Holloway Avenue to Lincoln Way. California Street/Park Presidio intersection will be repaved later during the summer. The schedule also includes upgrading the traffic detection system. Parking on 19th Avenue will be restricted to work zones during weekend closures; parking is permitted on side streets.

Even though one lane will always remain open to traffic while repaving is underway, motorists are encouraged to use alternative routes.

Alternate route: Geary Boulevard

  • Right on Geary
  • Left on Great Highway
  • Left on Lincoln Way
  • Right on Sunset Boulevard
  • Left on Sloat Boulevard

Alternate route: Fulton Street

  • Right on Fulton
  • Follow route above

Alternate route: Lincoln Way

  • Right on Lincoln Way
  • Left on Sunset Boulevard
  • Left on Sloat Boulevard

Southbound 19th Ave. closure and detour

19th Avenue (State Route 1) Rehabilitation Project in City of San Francisco detour map. May 8 -11th Project Closure Alternate Route 1: Geary Boulevard, Take right onto Geary Boulevard, Take a left onto Great Hwy, Take a left onto Lincoln Way, Take a right onto Sunset Boulevard, Take left onto Sloat Boulevard. Alternate Route 2: Fulton Street , Take right onto Fulton Street, Take a left onto Great Hwy, Take a left onto Lincoln Way, Take a right onto Sunset Boulevard, Take left onto Sloat Boulevard. Alternate Route 3: Lincoln Way, Take a right onto Lincoln Way, Take a left onto Sunset Boulevard, Take left onto Sloat Boulevard.

Advisories

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

  • This work is weather dependent.

Advisories

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

 

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.

Advisories

Upcoming Fab-4 projects:

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

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

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