CA · County

San Mateo Car Accidents & Crashes

San Mateo County has recorded 6,609 traffic crashes since 2024, including 10 fatal incidents. In the last 24 hours, 11 new crashes were reported. Crash volume is highest on US-101 N and US-101 S.

Data is sourced from the California Crash Records System (CCRS), maintained by the California Highway Patrol and updated daily, and the CA 511 live incident feed, refreshed every 15 minutes. CCRS records include party details, injury severity, vehicle information, and precise geographic coordinates. Last updated Oct. 29, 2026.

Breakdown by type: 16 accident.

16

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

1

Today

Reported since midnight

Today's Accidents Today's Fatalities

showing most recent 16 incidents with location data · click a marker to view details

Crash Records

San Mateo Incidents 16 results

16 accident

CHP : Disabled vehicle on CA-92 Eastbound at San Mateo Bridge - Eastbound Causeway (Foster City). Right lane blocked. Expect delays.

CA-92 E 2 hours, 54 minutes ago

CHP : Traffic Hazard on CA-92 Westbound east of San Mateo Bridge - High Rise (Foster City). Lanes affected. Expect delays.

CA-92 W 11 hours, 55 minutes ago

CHP : Disabled vehicle on CA-92 Eastbound west of Upper Skyline Blvd (Unincorporated). Right lane blocked. Expect delays.

CA-92 E 1 day, 7 hours ago

CHP : Traffic Collision on I-280 Northbound exiting at Millbrae Ave (Millbrae). Right lane and exit ramp blocked. Expect delays.

I-280 N 2 days, 1 hour ago

CHP : Severe traffic alert and Traffic Collision and Overturned vehicle on US-101 Northbound south of CA-92 W (San Mateo). Left and center lanes blocked. Expect delays.

US-101 N 2 days, 11 hours ago

CHP : Traffic Collision on US-101 Northbound entering at CA-92 W (San Mateo). On Ramp affected. Expect delays.

US-101 N 2 days, 12 hours ago

CHP : Traffic Collision on CA-92 Eastbound east of Main St (Half Moon Bay). Lane affected. Expect delays.

CA-92 E 2 days, 22 hours ago

CHP : Disabled vehicle on CA-92 Eastbound west of San Mateo Bridge - High Rise (Foster City). Right lane blocked. Expect delays.

CA-92 E 3 days, 12 hours ago

CHP : Traffic Hazard on CA-1 Northbound south of Higgins Canyon Rd (Half Moon Bay). Lanes affected. Expect delays.

CA-1 N 3 days, 12 hours ago

CHP : Disabled vehicle on US-101 Northbound at Willow Rd (Menlo Park). Off Ramp blocked. Expect delays.

US-101 N 4 days ago

CHP : Disabled vehicle on US-101 Southbound north of E Millbrae Ave (Millbrae). Off Ramp affected. Expect delays.

US-101 S 4 days ago

CHP : Traffic Collision on US-101 Southbound at E Millbrae Ave (Millbrae). On Ramp affected. Expect delays.

US-101 S 4 days, 14 hours ago

CHP : Traffic Collision on CA-1 Southbound north of 1st St (Montara). Lane blocked. Expect delays.

CA-1 S 5 days, 3 hours ago

CHP : Traffic Collision with Injuries on CA-1 Northbound north of 1st St (Montara). Right shoulder affected. Expect delays.

CA-1 N 5 days, 4 hours ago

CHP : Disabled vehicle on CA-92 Eastbound west of San Mateo Bridge - Eastbound Causeway (Foster City). Right lane blocked. Expect delays.

CA-92 E 6 days, 7 hours ago

CHP : Traffic Collision on US-101 Northbound south of E Millbrae Ave (Millbrae). Off Ramp affected. Expect delays.

US-101 N 6 days, 20 hours ago