We Are San Francisco

Highway 101 and 280 Weekend Closures Set

Expect lane reductions starting Friday night as crews work on major freeway rehabilitation projects.

Updated on Oct. 13, 2026 in Home Renovation

Gouache-painted illustration showing a diagonal row of orange traffic cones on worn asphalt, evoking San Francisco highway infrastructure work.
Caltrans crews will begin scheduled weekend lane closures on Highway 101 and Interstate 280 to conduct essential concrete repairs and infrastructure maintenance. AI Illustration. Upload story photo >

Live Poll

Do you feel frequent local freeway construction work is worth the resulting traffic delays in your area?

Drivers navigating San Francisco this weekend will encounter scheduled lane closures on Highway 101 and Interstate 280. Caltrans crews are performing paving and concrete repairs as part of a long-term infrastructure effort.

Why it matters

This maintenance aims to protect local bridges and road surfaces against future flooding and earthquakes, extending the life of the citys transit system. Residents heading to events at the Chase Center or the Embarcadero should plan for potential traffic delays near construction zones.

Highway 101 closures run from Friday at 11 p.m. to Monday at 6 a.m., while Interstate 280 lane reductions occur in two phases across the weekend. This work is part of a broader rehabilitation project scheduled to conclude in 2028.

The players

Caltrans

The state agency responsible for the maintenance and operation of California's highway system.

The details

Crews will install polyester concrete and perform grinding work on the Hospital Curve section of Highway 101 between Cesar Chavez and 17th Street. Interstate 280 work near the Alemany Maze is sequenced to maintain at least one northbound lane at all times. The project is part of a systemic effort to reinforce local infrastructure, with construction activities expected to continue annually through 2028.

Timeline

  1. Phase one of I-280 closures runs Friday from 10 p.m. to Saturday 9 a.m.

  2. Phase two of I-280 closures runs Saturday from 10 p.m. to Sunday 10 a.m.

  3. Highway 101 closures run from Friday at 11 p.m. through Monday at 6 a.m.

Across the Bay

This weekend's activity follows the pattern of the ongoing Caltrans highway rehabilitation program that targets infrastructure nearing the end of its design life. This specific project extends a multi-year initiative to modernize transit corridors that will remain under construction through 2028.

If you are driving to the Chase Center or the Embarcadero this weekend, prepare for delays and lane shifts near the Hospital Curve and Alemany Maze. Drivers are encouraged to allow extra time for travel starting Friday night.

The takeaway

Stay aware of changing road conditions if you have travel plans on the city's main freeways this weekend. Monitor traffic apps for real-time updates as Caltrans continues its multi-year rehabilitation cycle.

Further reading

For updates on infrastructure projects, check our coverage on Home Renovation.

Live Poll

Do you feel frequent local freeway construction work is worth the resulting traffic delays in your area?