CA · County

San Mateo Car Accidents & Crashes

San Mateo County has recorded 6,781 traffic crashes since 2024, including 10 fatal incidents. In the last 24 hours, 32 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 Nov. 5, 2026.

Breakdown by type: 22 accident.

22

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

4

Today

Reported since midnight

Today's Accidents Today's Fatalities

showing most recent 22 incidents with location data · click a marker to view details

Crash Records

San Mateo Incidents 22 results

22 accident

CHP : Traffic Hazard on I-280 Southbound at John Daly Blvd (Daly City). Off Ramp affected. Expect delays.

I-280 S 5 hours, 22 minutes ago

CHP : Disabled vehicle on CA-92 Eastbound at San Mateo Bridge - High Rise (Foster City). Lane affected. Expect delays.

CA-92 E 10 hours, 37 minutes ago

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

CA-1 N 11 hours, 52 minutes ago

CHP : Disabled vehicle on CA-1 Southbound exiting at Serramonte Blvd (Daly City). Off Ramp affected. Expect delays.

CA-1 S 17 hours, 7 minutes ago

CHP : Traffic Hazard on US-101 Southbound exiting at Sister Cities Blvd (South San Francisco). Off Ramp blocked. Expect delays.

US-101 S 19 hours, 37 minutes ago

CHP : Traffic Hazard on CA-92 Westbound at De Anza Blvd (San Mateo). Off Ramp blocked. Expect delays.

CA-92 W 1 day, 10 hours ago

CHP : Severe traffic alert and Traffic Collision on I-280 Southbound north of John Daly Blvd (Daly City). Right lanes blocked. Expect delays.

I-280 S 1 day, 17 hours ago

CHP : Traffic Hazard on CA-92 Westbound east of San Mateo Bridge - High Rise (Foster City). Left and center lanes blocked. Expect delays.

CA-92 W 1 day, 19 hours ago

CHP : Traffic Hazard on I-280 Northbound exiting at Alpine Rd (Menlo Park). Off Ramp blocked. Expect delays.

I-280 N 3 days ago

CHP : Traffic Collision with Injuries on CA-1 Northbound south of Carlos St (Moss Beach). Lane affected. Expect delays.

CA-1 N 3 days ago

CHP : Disabled vehicle on CA-92 Eastbound at San Mateo Bridge - High Rise (Foster City). Right shoulder affected. Expect delays.

CA-92 E 3 days, 10 hours ago

CHP : Traffic Hazard on CA-92 Westbound west of Pilarcitos Creek Rd (Unincorporated). Lane blocked. Expect delays.

CA-92 W 3 days, 13 hours ago

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

US-101 S 3 days, 21 hours ago

CHP : Disabled vehicle on I-280 Southbound exiting at Sand Hill Rd (Menlo Park). Off Ramp blocked. Expect delays.

I-280 S 4 days, 15 hours ago

CHP : Traffic Hazard on CA-1 Southbound ramp to I-280 S (Daly City). Connector ramp blocked. Expect delays.

CA-1 S 4 days, 17 hours ago

CHP : Severe traffic alert and Traffic Collision on US-101 Northbound south of Dore Ave (San Mateo). Left and center lanes blocked. Expect delays.

US-101 N 4 days, 21 hours ago

CHP : Traffic Collision on US-101 Southbound south of Marsh Rd (Menlo Park). Off Ramp affected. Expect delays.

US-101 S 5 days ago

CHP : Disabled vehicle on CA-1 Southbound south of Linda Mar Blvd (Pacifica). Lane blocked. Expect delays.

CA-1 S 5 days ago

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

CA-92 E 5 days, 16 hours ago

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

CA-92 E 5 days, 22 hours ago

CHP : Traffic Collision on CA-92 Westbound west of Alameda De Las Pulgas (San Mateo). Off Ramp affected. Expect delays.

CA-92 W 6 days, 11 hours ago

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

CA-92 E 6 days, 16 hours ago