CA · County

San Mateo Car Accidents & Crashes

San Mateo County has recorded 4,629 traffic crashes since 2024, including 9 fatal incidents. In the last 24 hours, 17 new crashes were reported. Crash volume is highest on US-101 N/B and US-101 N.

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 July 31, 2026.

Breakdown by type: 18 accident.

18

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

2

Today

Reported since midnight

Today's Accidents Today's Fatalities

showing most recent 18 incidents with location data · click a marker to view details

Crash Records

San Mateo Incidents 18 results

18 accident

CHP : Traffic Hazard on CA-92 Westbound east of Lower Skyline Blvd (Unincorporated). Lane affected. Expect delays.

CA-92 W 1 hour ago

CHP : Traffic Hazard on CA-1 Northbound south of Old Devil's Slide Hwy (Pacifica). Lanes affected. Expect delays.

CA-1 N 3 hours, 30 minutes ago

CHP : Traffic Hazard on CA-84 Eastbound east of University Ave (Menlo Park). Right and center lanes blocked. Expect delays.

CA-84 E 1 day, 15 hours ago

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

US-101 N 2 days, 15 hours ago

CHP : Traffic Collision on US-101 Southbound entering at CA-92 E (San Mateo). On Ramp blocked. Expect delays.

US-101 S 3 days, 1 hour ago

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

CA-92 W 3 days, 16 hours ago

CHP : Severe traffic alert and Traffic Collision with Injuries on US-101 Southbound north of Broadway (Burlingame). Left and center lanes blocked. Expect delays.

US-101 S 3 days, 18 hours ago

CHP : Pothole on CA-92 Westbound east of Upper Skyline Blvd (Unincorporated). Lane affected. Expect delays.

CA-92 W 3 days, 19 hours ago

CHP : Traffic Collision with Injuries on US-101 Northbound exiting at Woodside Rd (Redwood City). Off Ramp closed. Expect delays.

US-101 N 4 days, 1 hour ago

CHP : Severe traffic alert and Traffic Collision with Injuries on US-101 Northbound north of Sierra Point Pky (Brisbane). Right and left lanes blocked. Expect delays.

US-101 N 4 days, 4 hours ago

CHP : Traffic Collision on US-101 Southbound exiting at Woodside Rd (Redwood City). Off Ramp blocked. Expect delays.

US-101 S 4 days, 17 hours ago

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

CA-92 E 4 days, 19 hours ago

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

CA-92 E 4 days, 22 hours ago

CHP : Fire on US-101 Southbound at Marsh Rd (Menlo Park). Off Ramp affected. Expect delays.

US-101 S 5 days, 6 hours ago

CHP : Disabled vehicle on CA-84 Eastbound at Dumbarton Bridge - Midspan (Fremont). Lane blocked. Expect delays.

CA-84 E 5 days, 11 hours ago

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

CA-1 N 5 days, 12 hours ago

CHP : Disabled vehicle on CA-84 Westbound east of Dumbarton Bridge - Toll Plaza (Fremont). Right shoulder affected. Expect delays.

CA-84 W 5 days, 18 hours ago

CHP : Traffic Collision with Injuries on I-280 Northbound exiting at Sand Hill Rd (Menlo Park). Off Ramp closed. Expect delays.

I-280 N 5 days, 23 hours ago