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San Francisco Freeway & Road Rehabilitation

Upcoming Full Weekend Closures

Weekend Closure on Southbound U.S. 101 Bayshore Freeway (Hospital Curve) November 6-9

Friday, November 6, 11 p.m. to Monday, November 9, 6 a.m.

On the weekend of November 6-9, all U.S. 101 Bayshore Freeway (Hospital Curve) southbound lanes between 17th St. and Cesar Chavez will be closed for Caltrans to complete repaving southbound lanes of the freeway. This weekend closure begins Friday November 6, 11 p.m. until Monday, November 9, 6 a.m. 

Throughout the weekend closure motorists will not have access to the following ramps:

  • 4th St. on ramp
  • 7th St. on ramp
  • 10th St. on ramp
  • WB 80-NB 101 Central Freeway Connector 

Repaving of the U.S. 101 Bayshore Freeway (Hospital Curve) began in September on the northbound lanes, followed by work on two southbound lanes in October. This weekend, Caltrans will complete the project by repaving the remaining two southbound lanes. This project is part of the broader U.S. 101 Bayshore Freeway (Hospital Curve) rehabilitation project which began in Fall of 2025. 

Important to remember:

  • All southbound 101 Bayshore Freeway (Hospital Curve) lanes between 17th St. and Cesar Chavez will be closed.
  • All northbound lanes will remain open for public travel.
  • Motorists should avoid driving southbound 101 Bayshore Freeway (Hospital Curve) due to anticipated delays.
  • Use SB I-280 as an alternate route.
Detour Information

For detour information during these closures, please go to the U.S. 101 Bayshore Freeway (Hospital Curve) rehabilitation Detour page.

For more information on this project visit:

San Francisco US-101 Rehabilitation | Caltrans

Weekend Southbound US-101 Closure and Routes. Westbound I-80/Southbound US-101 Closed from 7th Street to Cesar Chavez Street. Detour for WB I-80: Exit 5th Street Off-ramp to Harrison Street. Left on 5th Street or 6th Street to SB I-280. Last Exit Detour I-80 WB: Exit 8th Street Off-ramp to Harrison Street to 9th Street to Potrero Avenue. Last Exit Detour US-101 SB: Take I-80 EB to 4th Street Off-ramp to I-280. Secondary Routes: Guerrero Street to I-280 or South Van Ness to I-280.

Project Media Gallery

Additional project resources including downloadable maps, image galleries, and video clips can be found on the media resources pages.

Bridge Rehabilitation of Central (US 101) and Bayshore (I-80) Viaducts Media Resources.

U.S. 101 (Hospital Curve) Rehabilitation Project Media Resources.

Traffic Advisories

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.

Photo of San Francisco buildings form the skyline.

Current Projects

San Francisco-Oakland Bay Bridge: Upcoming Lane and Ramp Closures

Thursday (10/29/2026) Night

  • Westbound I 80 Lane Closure
    • Lane 1 - From SAS Tower to San Francisco-Oakland Bay Bridge Tower 2 (W-2) - 9:00 PM to 5:00 AM
    • Lane 2 - From SAS Tower to San Francisco-Oakland Bay Bridge Tower 2 (W-2) - 9:00 PM to 5:00 AM
    • Lane 3 - From SAS Tower to San Francisco-Oakland Bay Bridge Tower 2 (W-2) - 11:00 PM to 4:00 AM
  • Eastbound I 80 Lane Closures
    • Lane 1 - San Francisco Anchorage/Rincon Hill to Yerba Buena Island Tunnel - 10:00 PM to 7:00 AM
    • Lane 2 - San Francisco Anchorage/Rincon Hill to Yerba Buena Island Tunnel - 11:00 PM to 7:00 AM
    • Lane 3 - San Francisco Anchorage/Rincon Hill to Yerba Buena Island Tunnel - 12:00 AM to 6:00 AM
    • Lane 4 - San Francisco Anchorage/Rincon Hill to Yerba Buena Island Tunnel - 1:00 AM to 5:00 AM
  • Eastbound I 80 First Street On-Ramp Closure
    • First Street On-Ramp - First Street to eastbound I-80 - 12:00 AM - 7:00 AM
  • Eastbound I 80 Essex Street On-Ramp Closure
    • Essex Street On-Ramp - Essex Street to eastbound I-80 - 12:00 AM - 7:00 AM
  • Eastbound I-80 Transbay Transit Center Bus On-Ramp Closure
    • Bus On-Ramp - Transbay Transit Center to eastbound I-80 - 12:00 AM - 7:00 AM

Friday (10/30/2026) Daytime

  • No lane closures scheduled.
Caltrans working on the San Francisco Bay Bridge for the San Francisco-Oakland Bay Bridge Joint Rehabilitation Project.

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

The San Francisco-Oakland Bay Bridge Structural Steel Painting & Spall Repairs

Project Schedule — through Spring 2031

Advisories

A view of the new San Francisco-Oakland Bay Bridge East Span.

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

 

Advisories

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

The fourth and final weekend closure to complete repaving the remaining southbound U.S. 101 Bayshore Freeway (Hospital Curve) lanes between Cesar Chavez and 17th St., is scheduled for Friday, November 6, 11 p.m. to Monday, November 9, 6 a.m. All northbound lanes will remain open during this closure weekend.

Also, crews will begin grinding operations in the weeks ahead, on the newly repaved NB U.S. 101 Bayshore Freeway (Hospital Curve) to smooth out road.

During the November 6 through 9 weekend closure:

  • All northbound lanes will remain open for public travel.
  • Motorists should avoid driving southbound 101 (Hospital Curve) due to anticipated delays.
  • Use SB I-280 as an alternate route.

**This November closure was rescheduled from an October 2-5 date.

Detour Information

For detour information during these closures, please go to the U.S. 101 Bayshore Freeway (Hospital Curve) rehabilitation Detour page.

This work is weather dependent.

Advisories

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

REOPENED: Weekend Closures on Westbound I-80 Bayshore Freeway

The full weekend closure to apply polyester concrete to the WB I-80 Bayshore Freeway which began Friday, October 23, has successfully been completed, as of Monday Oct. 26., at 3:32 a.m., several hours ahead of schedule. All lanes and ramps are now open. Drivers can now enjoy a safer, smoother ride as the road is prepared for this winter's rainy weather.

The next full weekend closure on San Francisco freeways will be to complete repaving the remaining southbound U.S. 101 Bayshore Freeway (Hospital Curve) lanes between Cesar Chavez and 17th St. This is scheduled for Friday, November 6, 11 p.m. to Monday, November 9, 6 a.m. All northbound lanes will remain open during this closure weekend.

WB I-80 Complete Freeway Closures Detour Map. Detour from 4th st and 7th St on-ramp to NB Van Ness Ave (US-101) and Octavia blvd: SB Harrison St; WB 9th St; WB Hayes St; SB Gough St; WB Fell St to Octavia Blvd. Detour from 4th St and 7th St On-Ramp to SB US-101: SB Harrison St; EB 10th St; On-ramp to SB US-101. Detours from WB I-80 to SB US-101: Off-ramp to 9th St; SB Harrison St; EB 10th St; On-ramp to SB US-101. Detour from WB I-80 to US-101 to Van Ness Ave (US-101) and Octavia Blvd: Off-ramp to 9th St; SB Harrison St; NB 9th St; WB Hayes St; SB Gough St; WB Fell St to Octavia Blvd. SB Harrison St/WB 4th St On-ramp closed. SB Harrison St/WB 7th St On-ramp closed. WB I-80 Complete Freeway Closed. Last exit for motorists will be 5th St Off-ramp.

 

Caltrans appreciates the public’s patience as crews work to maintain and improve Bay Area highways.

Advisories

 

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.

Upcoming Lane and Ramp Closures

Caltrans has successfully completed the weekend freeway work on northbound Interstate 280 (NB I 280) between Mariposa Street and the I 280/US 101 Interchange, conducted October 2–5. Crews installed approximately two miles of polyester concrete on lanes 1 and 2, enhancing long term pavement durability and improving ride quality for motorists.

Advisories

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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