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Highway 101 Construction May Affect Traffic to/from SFO. Please Plan Accordingly.

Ramp Closure for Signage Installation

  • The Southbound 101 ramp to the Airport will be closed on Tuesday, July 14 from of 12:00 midnight to 4:00 a.m.
  • The Northbound 101 ramp to the Airport will be closed on Wednesday, July 15 from 12:00 midnight to 4:00 a.m.

Detours will be in place to loop traffic back to the Airport via Millbrae Ave (southbound) and via San Bruno Ave (northbound).

San Mateo 101 Express Lanes Project 
Caltrans is constructing express lanes on U.S. 101 from Redwood City to I-380 in South San Francisco.  During the project, freeway lane and ramp closures will occur on northbound and southbound U.S. 101. At times, lanes and exits at or near SFO will be impacted. Most work is scheduled to take place between 8:00 p.m. and 6:00 a.m., Sunday through Thursday. Closures will be marked by roadway signage, with detour signs posted.

Please view Caltrans’ construction schedule for closure information and plan any travel to/from SFO accordingly.