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Interstate 280 Bridge Rehabilitation

Interstate 280 Bridge Rehabilitation Project Page Banner

Current Advisories

Overnight Ramp Closures on I-280 between Ocean Ave. and San Bruno Ave., in San Francisco due to maintenance work

Project Overview

The Highway Maintenance Bridge Project on I-280 begins October 24, 2024, on seven locations along a 10-mile stretch along the I-280 corridor. All repairs will take place at night and will require full ramp closures. The purpose of the work is to prolong the useful service life and integrity of six bridges, at seven locations in the city and county of San Francisco.

The project to rehabilitate the bridges proposes to place polyester concrete overlay, replace joint seals, and repair asphalt concrete approaches at six bridges at seven locations. The locations include Monterey Boulevard On-ramp Overcrossing, San Jose Avenue Undercrossing, Lyell Street Undercrossing, I- 280/101 Interchange: NB 101 to NB 280 (lower deck); I-280/101 Interchange: SB 280 to SB 101 (Upper deck), I-280/101 Interchange: NB 280, and the I-280/101 Interchange: SB 280.

The project will be completed by repairing one bridge at a time. The first repair location takes place at the Lyell St. Undercrossing on ramp and off ramp, beginning Wednesday, October 24. Other project locations, schedules, and detours will be announced soon. The entire project is scheduled to be completed in three months (tentatively January 2025).

Map of Interstate 280 Bridge Rehabilitation project future location of repairs.

Image highlights future locations of repairs

Map of Interstate 280 Bridge Rehabilitation project additional future repairs at San Jose Ave. and Monterey Blvd. Lyell St. undercrossing bridge.

Image highlights additional future repairs at San Jose Ave. and Monterey Blvd. Lyell St. undercrossing bridge will be the first of the repairs which begins October 23-November 6

Project Location

  • Lyell St. undercrossing: October 24-November 9
  • Monterey Blvd. on ramp overcrossing
  • San Jose Ave. undercrossing
  • I- 280/101 interchange: NB 101 to NB 280 (lower deck)
  • I-280/101 Interchange: SB 280 to SB 101 (upper deck)
  • I-280/101 Interchange: NB 280
  • I-280/101 Interchange: SB 280

Project Schedule

  • Wednesday January 22
    • The SB 280 / Monterey Blvd. Off Ramp, will be closed Wednesday, January 22, 2025, 9:00 AM to 1:00 PM.
      Detours are in place.
  • Monday, January 27-Friday, January 31
    • The SB 280/Monterey Blvd off ramp will close, Monday to Friday 10:00 AM to 1:00 PM.
    • The SB Ramp will close 10:00 PM at 5:00AM. And NB ramp closes at 8:00 PM to 5:00 AM.
      Detours will be in place.

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