Daytime and Overnight Lane & Ramp Closures Scheduled on U.S. 101

Published on October 06, 2026

Caltrans has scheduled intermittent ramp and lane closures of U.S. 101 in San Mateo County to allow crews to perform paving, guardrail, drainage, and electrical work. This phase of the work will continue through Friday, October 30 between South San Francisco and East Palo Alto.

Intermittent Nighttime Lane and Ramp Closures: (9 p.m. – 5 a.m.) on the following weeknights

Northbound 101 / Southbound 101: Monday, October 5 through Friday, October 30 

Intermittent Daytime Ramp Closures: (7 a.m. – 3 p.m.)

Partial ramp closures will continue within the project limits between South San Francisco and East Palo Alto so that crews can perform curb ramp upgrades.

Construction activities may generate noise during work hours, and nearby residents and businesses may experience temporary disruptions.

All work is weather dependent. Please drive with caution. Thank you for your patience as we work to maintain our state’s highways, bridges, and tunnels.

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