CA · County

San Mateo Car Accidents & Crashes

San Mateo County has recorded 6,565 traffic crashes since 2024, including 10 fatal incidents. In the last 24 hours, 26 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. 27, 2026.

Breakdown by type: 523 accident.

523

Total Crashes

Filtered results

10

Fatalities

Fatal injury reports

1

Today

Reported since midnight

Today's Accidents Today's Fatalities

showing most recent 500 incidents with location data · click a marker to view details

Crash Records

San Mateo Incidents 523 results

523 accident

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

CA-92 E 6 hours, 45 minutes 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 20 hours ago

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

CA-1 N 20 hours, 15 minutes ago

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

US-101 N 1 day, 8 hours ago

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

US-101 S 1 day, 8 hours ago

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

US-101 S 1 day, 22 hours ago

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

CA-1 S 2 days, 11 hours ago

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

CA-1 N 2 days, 12 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 3 days, 15 hours ago

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

US-101 N 4 days, 4 hours ago

CHP : Severe traffic alert and Traffic Collision with Injuries on I-280 Northbound north of Washington St (Daly City). Left and center lanes blocked. Expect delays.

I-280 N 4 days, 13 hours ago

CHP : Severe traffic alert and Traffic Collision with Injuries on CA-92 Westbound west of San Mateo Bridge - High Rise (Foster City). Left lane blocked. Expect delays.

CA-92 W 5 days, 17 hours ago

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

US-101 S 5 days, 19 hours ago

CHP : Traffic Collision on I-280 Southbound south of Washington St (Daly City). Right lane and exit ramp blocked. Expect delays.

I-280 S 6 days, 7 hours ago

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

CA-92 E 6 days, 22 hours ago

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

CA-92 E 1 week ago

CHP : Traffic Hazard on US-101 Northbound at Oyster Point Blvd (South San Francisco). Off Ramp affected. Expect delays.

US-101 N 1 week ago

CHP : Traffic Collision on I-380 Westbound north of El Camino Real (San Bruno). Off Ramp affected. Expect delays.

I-380 W 1 week ago

CHP : Severe traffic alert and Traffic Collision on CA-92 Westbound east of S Delaware St (San Mateo). Right and center lanes blocked. Expect delays.

CA-92 W 1 week ago

CHP : Traffic Collision on I-380 Westbound north of El Camino Real (San Bruno). On Ramp affected. Expect delays.

I-380 W 1 week, 2 days ago

CHP : Disabled vehicle on US-101 Northbound at E Millbrae Ave (Millbrae). On Ramp affected. Expect delays.

US-101 N 1 week, 2 days ago

CHP : Traffic Collision on CA-84 Eastbound and Westbound west of I-280 S (Woodside). All lanes blocked. Avoid the area.

CA-84 W 1 week, 2 days ago

CHP : Traffic Collision on CA-84 Eastbound and Westbound west of I-280 S (Woodside). All lanes blocked. Avoid the area.

CA-84 E 1 week, 2 days ago

CHP : Disabled truck on CA-1 Southbound north of Old Devil's Slide Hwy (Pacifica). Lane blocked. Expect delays.

CA-1 S 1 week, 2 days ago

CHP : Traffic Collision with Injuries on I-280 Northbound north of Sand Hill Rd (Menlo Park). On Ramp blocked. Expect delays.

I-280 N 1 week, 3 days ago

CHP : Traffic Collision on CA-92 Westbound at San Mateo Bridge - High Rise (Foster City). Lanes blocked. Expect delays.

CA-92 W 1 week, 3 days ago

CHP : Severe traffic alert and Traffic Collision with Injuries on I-280 Northbound south of Trousdale Dr (Burlingame). Right lanes blocked. Expect delays.

I-280 N 1 week, 3 days ago

CHP : Disabled vehicle on US-101 Northbound ramp to CA-92 W (San Mateo). Connector ramp affected. Expect delays.

US-101 N 1 week, 4 days ago

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

CA-92 E 1 week, 4 days ago

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

CA-92 E 1 week, 6 days ago

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

CA-92 W 1 week, 6 days ago

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

CA-92 E 1 week, 6 days ago

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

US-101 N 1 week, 6 days ago

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

CA-92 E 2 weeks, 1 day ago

CHP : Disabled vehicle on US-101 Southbound north of Lagoon Way (South San Francisco). Off Ramp affected. Expect delays.

US-101 S 2 weeks, 1 day ago

CHP : Disabled vehicle on CA-92 Eastbound west of Ralston Ave (San Mateo). Off Ramp blocked. Expect delays.

CA-92 E 2 weeks, 2 days ago

CHP : Disabled vehicle on CA-92 Eastbound west of Ralston Ave (San Mateo). Off Ramp blocked. Expect delays.

CA-92 E 2 weeks, 2 days ago

CHP : Residual delays on CA-1 Northbound north of Capistrano Rd (El Granada). Right shoulder affected. Expect delays.

CA-1 N 2 weeks, 2 days ago

CHP : Traffic Hazard on CA-92 Eastbound at San Mateo Bridge - Eastbound Causeway (Foster City). Left lane blocked. Expect delays.

CA-92 E 2 weeks, 2 days ago

CHP : Traffic Collision on CA-1 Northbound north of Capistrano Rd (El Granada). Right shoulder affected. Expect delays.

CA-1 N 2 weeks, 2 days ago

CHP : Traffic Collision on CA-1 Northbound north of Capistrano Rd (El Granada). Lane affected. Expect delays.

CA-1 N 2 weeks, 3 days ago

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

CA-1 N 2 weeks, 3 days ago

CHP : Traffic Hazard on CA-1 Southbound entering at Bay St (Unincorporated). Right lane affected. Expect delays.

CA-1 S 2 weeks, 3 days ago

CHP : Disabled vehicle on US-101 Southbound entering at E 3RD Ave (San Mateo). On Ramp blocked. Expect delays.

US-101 S 2 weeks, 4 days ago

CHP : Vehicle fire on US-101 Northbound exiting at Ralston Ave (Belmont). Off Ramp blocked. Expect delays.

US-101 N 2 weeks, 5 days ago

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

CA-92 W 2 weeks, 5 days ago

CHP : Traffic Collision with Injuries on CA-92 Eastbound at San Mateo Bridge - Eastbound Causeway (Foster City). Left lane blocked. Expect delays.

CA-92 E 2 weeks, 6 days ago

CHP : Traffic Hazard on CA-92 Westbound entering at S Delaware St (San Mateo). On Ramp affected. Expect delays.

CA-92 W 3 weeks ago

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

CA-92 E 3 weeks, 1 day ago

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

CA-92 E 3 weeks, 1 day ago