CA · County

San Mateo Car Accidents & Crashes

San Mateo County has recorded 6,763 traffic crashes since 2024, including 10 fatal incidents. In the last 24 hours, 22 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. 4, 2026.

Breakdown by type: 84 accident.

84

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

4

Today

Reported since midnight

Today's Accidents Today's Fatalities

showing most recent 84 incidents with location data · click a marker to view details

Crash Records

San Mateo Incidents 84 results

84 accident

CHP : Traffic Collision on US-101 Southbound south of Lagoon Way (South San Francisco). Left lane blocked. Expect delays.

Moderate Accident

US-101 S 14 minutes ago Live

CHP : Disabled vehicle on US-101 Southbound north of E Millbrae Ave (Millbrae). 3rd lane from the left blocked. Expect delays.

Moderate Accident

US-101 S 14 minutes ago Live

CHP : Traffic Collision on US-101 Northbound south of Oyster Point Blvd (South San Francisco). Right shoulder affected. Expect delays.

Moderate Accident

US-101 N 44 minutes ago

CHP : Residual delays on US-101 Northbound south of Oyster Point Blvd (South San Francisco). Right shoulder affected. Expect delays.

Moderate Accident

US-101 N 59 minutes ago

CHP : Traffic Collision with Injuries on US-101 Northbound south of Willow Rd (Menlo Park). Right and center lanes blocked. Expect delays.

Moderate Accident

US-101 N 1 hour, 59 minutes ago

CHP : Traffic Hazard on US-101 Southbound north of E 3RD Ave (San Mateo). Right and center lanes affected. Expect delays.

Moderate Accident

US-101 S 2 hours, 59 minutes ago

CHP : Traffic Hazard on US-101 Northbound south of Willow Rd (Menlo Park). Lane blocked. Expect delays.

Moderate Accident

US-101 N 6 hours, 29 minutes ago

CHP : Traffic Hazard on US-101 Southbound south of E Hillsdale Blvd (San Mateo). Lane affected. Expect delays.

Moderate Accident

US-101 S 20 hours, 59 minutes ago

CHP : Disabled vehicle on US-101 Southbound north of Holly St (San Carlos). 2nd lane from the left blocked. Expect delays.

Moderate Accident

US-101 S 20 hours, 59 minutes ago

CHP : Traffic Collision on US-101 Northbound exiting at E 3RD Ave (San Mateo). Left lane blocked. Expect delays.

Moderate Accident

US-101 N 22 hours, 59 minutes ago

CHP : Traffic Collision on US-101 Northbound south of S Airport Blvd (South San Francisco). Lane blocked. Expect delays.

Moderate Accident

US-101 N 23 hours, 29 minutes ago

CHP : Disabled vehicle on US-101 Northbound north of S Airport Blvd (South San Francisco). Right lane blocked. Expect delays.

Moderate Accident

US-101 N 23 hours, 29 minutes ago

CHP : Traffic Collision on US-101 Northbound south of Redwood Shores Pky (San Carlos). Lane affected. Expect delays.

Moderate Accident

US-101 N 23 hours, 44 minutes ago

CHP : Traffic Hazard on US-101 Southbound at CA-92 W (San Mateo). Right lane affected. Expect delays.

Moderate Accident

US-101 S 1 day ago

CHP : Traffic Collision on US-101 Northbound south of Redwood Shores Pky (San Carlos). Left lane blocked. Expect delays.

Moderate Accident

US-101 N 1 day ago

CHP : Traffic Collision on I-280 Northbound exiting at Golf Course Dr (Unincorporated). Left lane blocked. Expect delays.

Moderate Accident

I-280 N 1 day, 1 hour ago

CHP : Traffic Collision on CA-35 Northbound at Old La Honda Rd (Portola Valley). Lane affected. Expect delays.

Moderate Accident

CA-35 N 1 day, 1 hour ago

CHP : Traffic Collision on US-101 Southbound exiting at Holly St (San Carlos). Right lane blocked. Expect delays.

Moderate Accident

US-101 S 1 day, 5 hours ago

CHP : Traffic Collision on CA-1 Northbound south of Serramonte Blvd (Daly City). Lane affected. Expect delays.

Moderate Accident

CA-1 N 1 day, 5 hours ago

CHP : Traffic Hazard on CA-92 Eastbound west of W Hillsdale Blvd (San Mateo). Lane affected. Expect delays.

Moderate Accident

CA-92 E 1 day, 6 hours ago

CHP : Traffic Hazard on I-280 Southbound south of I-280 S-CA-92 W Ramp (San Mateo). Right lane blocked. Expect delays.

Moderate Accident

I-280 S 1 day, 7 hours ago

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

Moderate Accident

CA-92 W 1 day, 7 hours ago

CHP : Traffic Hazard on CA-92 Westbound west of San Mateo Bridge - High Rise (Foster City). Right lane blocked. Expect delays.

Moderate Accident

CA-92 W 1 day, 9 hours ago

CHP : Disabled vehicle on US-101 Northbound south of E 3RD Ave (San Mateo). Left lanes blocked. Expect delays.

Moderate Accident

US-101 N 1 day, 10 hours ago

CHP : Traffic Hazard on I-280 Northbound north of Junipero Serra Blvd (Daly City). 2nd lane from the left blocked. Expect delays.

Moderate Accident

I-280 N 1 day, 10 hours ago

CHP : Traffic Hazard on I-280 Northbound north of John Daly Blvd (Daly City). 2nd lane from the left affected. Expect delays.

Moderate Accident

I-280 N 1 day, 11 hours ago

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

Moderate Accident

CA-92 W 1 day, 11 hours ago

CHP : Traffic Collision with Injuries on US-101 Southbound at Ralston Ave (Belmont). Right shoulder affected. Expect delays.

Moderate Accident

US-101 S 1 day, 14 hours ago

CHP : Vehicle fire on US-101 Southbound north of University Ave (East Palo Alto). Lane affected. Expect delays.

Moderate Accident

US-101 S 1 day, 16 hours ago

CHP : Traffic Collision on US-101 Northbound south of E Hillsdale Blvd (San Mateo). Left lanes blocked. Expect delays.

Moderate Accident

US-101 N 1 day, 20 hours ago

CHP : Traffic Collision with Injuries on US-101 Northbound south of CA-92 W (San Mateo). 2nd lane from the left affected. Expect delays.

Moderate Accident

US-101 N 1 day, 20 hours ago

CHP : Traffic Hazard on I-280 Southbound south of San Bruno Ave W (San Bruno). Lane affected. Expect delays.

Moderate Accident

I-280 S 1 day, 21 hours ago

CHP : Traffic Hazard on CA-35 Northbound north of Phleger Rd (Unincorporated). Lanes affected. Expect delays.

Moderate Accident

CA-35 N 1 day, 23 hours ago

CHP : Traffic Collision on I-280 Northbound south of CA-92 W (San Mateo). Right lane blocked. Expect delays.

Moderate Accident

I-280 N 2 days ago

CHP : Traffic Collision on CA-84 Eastbound at Alameda De Las Pulgas (Redwood City). Lane affected. Expect delays.

Moderate Accident

CA-84 E 2 days, 1 hour ago

CHP : Traffic Hazard on I-380 Westbound west of El Camino Real (San Bruno). Right lanes affected. Expect delays.

Moderate Accident

I-380 W 2 days, 1 hour ago

CHP : Traffic Collision on CA-92 Westbound east of S El Camino Real (San Mateo). Lane affected. Expect delays.

Moderate Accident

CA-92 W 2 days, 9 hours ago

CHP : Fire on I-280 Southbound north of Sand Hill Rd (Menlo Park). Lane affected. Expect delays.

Moderate Accident

I-280 S 2 days, 9 hours ago

CHP : Fire on I-280 Southbound exiting at Serramonte Blvd (Daly City). Lane affected. Expect delays.

Moderate Accident

I-280 S 2 days, 10 hours ago

CHP : Traffic Collision on I-280 Southbound north of CA-84 W (Woodside). Right lane affected. Expect delays.

Moderate Accident

I-280 S 2 days, 11 hours ago

CHP : Disabled vehicle on I-280 Southbound north of Serramonte Blvd (Daly City). Lane affected. Expect delays.

Moderate Accident

I-280 S 2 days, 18 hours ago

CHP : Traffic Collision on I-380 Eastbound at US-101 S (South San Francisco). Left lane blocked. Expect delays.

Moderate Accident

I-380 E 2 days, 21 hours ago

CHP : Traffic Hazard on US-101 Northbound at CA-92 E (San Mateo). Right shoulder blocked. Expect delays.

Moderate Accident

US-101 N 2 days, 23 hours ago

CHP : Disabled vehicle on US-101 Northbound south of Redwood Shores Pky (San Carlos). Right shoulder affected. Expect delays.

Moderate Accident

US-101 N 3 days, 2 hours ago

CHP : Traffic Hazard on US-101 Northbound south of Whipple Ave (Redwood City). Lane blocked. Expect delays.

Moderate Accident

US-101 N 3 days, 3 hours ago

CHP : Traffic Hazard on I-280 Southbound north of John Daly Blvd (Daly City). Lane blocked. Expect delays.

Moderate Accident

I-280 S 3 days, 9 hours ago

CHP : Disabled vehicle on US-101 Northbound south of Beatty Rd (Brisbane). Lane affected. Expect delays.

Moderate Accident

US-101 N 3 days, 10 hours ago

CHP : Traffic Collision with Injuries on I-280 Northbound south of Avalon Dr (South San Francisco). Right shoulder affected. Expect delays.

Moderate Accident

I-280 N 3 days, 10 hours ago

CHP : Traffic Collision on I-280 Northbound south of Sand Hill Rd (Menlo Park). Lane affected. Expect delays.

Moderate Accident

I-280 N 3 days, 11 hours ago

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

Moderate Accident

US-101 N 3 days, 14 hours ago