Northbound I-280 Freeway Partial Lane Closures Weekend of October 2-5, at Mariposa & the I-280/US 101 Interchange

Friday, October 2, 10 p.m. to Monday, October 5, 5 a.m.

San Francisco County - Caltrans is planning a 55-hour weekend closure of northbound Interstate 280 (NB 280) as part of the I-280 Rehabilitation and Pedestrian Overcrossing Project. This will limit the northbound lanes, leaving only one lane available to traffic. The work will take place between Mariposa Street and the U.S. 101 Interchange and involves installing a polyester concrete deck overlay to improve long-term pavement durability and ride quality.

Closure Details

• Highway: Northbound I-280 only
• Southbound I-280: No work scheduled; SB lanes will remain open
• Closure Window:
  • Begins 10:00 PM Friday, October 2
  • Ends 5:00 AM Monday, October 5

Work Description

• Activity: Polyester Concrete Deck Overlay
• Limits: Mariposa to 101 Interchange

Motorist Impacts

Motorists should expect delays, plan alternate routes, and follow posted detour signs during the full northbound closure. Caltrans advises drivers to allow additional travel time and use public transit or alternate highways when possible.

Driver Community Benefits of Completed Work

• Freeway corridor is now preserved with a 40-year life span.
• Ride quality and driving comfort are improved.
• Overall freeway safety is enhanced.

Stay Informed

For the latest updates visit sfhighwayprojects.com where Caltrans will continue to provide updates as schedules are confirmed. Motorists should check back regularly for the latest construction information, traffic impacts, and detour details.

Thank you for your patience and cooperation.

For real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/