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San Mateo Car Accidents & Crashes

San Mateo County has recorded 6,621 traffic crashes since 2024, including 10 fatal incidents. In the last 24 hours, 16 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. 30, 2026.

Breakdown by type: 75 accident.

75

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

7

Today

Reported since midnight

Today's Accidents Today's Fatalities

showing most recent 75 incidents with location data · click a marker to view details

Crash Records

San Mateo Incidents 75 results

75 accident

CHP : Traffic Hazard on US-101 Northbound north of Airport Exit (Millbrae). 3rd lane from the left blocked. Expect delays.

Moderate Accident

US-101 N 8 minutes ago Live

CHP : Traffic Collision on I-280 Northbound at Hickey Blvd (Daly City). Lane affected. Expect delays.

Moderate Accident

I-280 N 2 hours, 23 minutes ago

CHP : Traffic Hazard on I-280 Southbound at Alpine Rd (Menlo Park). Lane affected. Expect delays.

Moderate Accident

I-280 S 8 hours, 38 minutes ago

CHP : Fire on US-101 Southbound north of Marsh Rd (Menlo Park). Lane affected. Expect delays.

Moderate Accident

US-101 S 10 hours, 38 minutes ago

CHP : Disabled vehicle on CA-1 Southbound north of Serramonte Blvd (Daly City). Lane blocked. Expect delays.

Moderate Accident

CA-1 S 11 hours, 53 minutes ago

CHP : Disabled vehicle on US-101 Northbound north of Whipple Ave (Redwood City). 2nd lane from the left affected. Expect delays.

Moderate Accident

US-101 N 14 hours, 53 minutes ago

CHP : Traffic Collision on I-280 Northbound south of I-280 N-CA-1 N Split (Daly City). Left and center lanes blocked. Expect delays.

Moderate Accident

I-280 N 15 hours, 53 minutes ago

CHP : Traffic Hazard on US-101 Southbound north of Airport Exit (Millbrae). Lane affected. Expect delays.

Moderate Accident

US-101 S 1 day, 3 hours ago

CHP : Vehicle fire on I-280 Southbound north of Edgewood Rd (Unincorporated). Right shoulder affected. Expect delays.

Moderate Accident

I-280 S 1 day, 21 hours ago

CHP : Disabled vehicle on US-101 Southbound entering at Airport Exit (Millbrae). Left lane blocked. Expect delays.

Moderate Accident

US-101 S 1 day, 22 hours ago

CHP : Traffic Collision on US-101 Northbound south of E 3RD Ave (San Mateo). Lane affected. Expect delays.

Moderate Accident

US-101 N 1 day, 22 hours ago

CHP : Traffic Collision on US-101 Southbound exiting at E Poplar Ave (San Mateo). Left lanes blocked. Expect delays.

Moderate Accident

US-101 S 1 day, 22 hours ago

CHP : Traffic Hazard on US-101 Southbound north of Beatty Rd (Brisbane). Lane affected. Expect delays.

Moderate Accident

US-101 S 1 day, 22 hours ago

CHP : Traffic Hazard on I-380 Eastbound west of US-101 S (South San Francisco). 2nd lane from the left affected. Expect delays.

Moderate Accident

I-380 E 2 days ago

CHP : Traffic Hazard on US-101 Northbound south of Ralston Ave (Belmont). Right lane blocked. Expect delays.

Moderate Accident

US-101 N 2 days, 1 hour ago

CHP : Traffic Hazard on CA-92 Eastbound west of Ralston Ave (San Mateo). Right shoulder affected. Expect delays.

Moderate Accident

CA-92 E 2 days, 9 hours ago

CHP : Traffic Hazard on I-280 Northbound south of Junipero Serra Blvd (Daly City). Right lane blocked. Expect delays.

Moderate Accident

I-280 N 2 days, 15 hours ago

CHP : Traffic Hazard on US-101 Northbound north of San Bruno Ave E (San Bruno). HOV affected. Expect delays.

Moderate Accident

US-101 N 2 days, 16 hours ago

CHP : Disabled vehicle on US-101 Northbound south of CA-92 W (San Mateo). Left lane blocked. Expect delays.

Moderate Accident

US-101 N 2 days, 17 hours ago

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

Moderate Accident

CA-92 W 2 days, 17 hours ago

CHP : Traffic Hazard on I-280 Northbound south of Edgewood Rd (Unincorporated). Right and center lanes affected. Expect delays.

Moderate Accident

I-280 N 2 days, 20 hours ago

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

Moderate Accident

US-101 N 2 days, 21 hours ago

CHP : Traffic Collision with Injuries on US-101 Southbound south of Whipple Ave (Redwood City). Right and center lanes blocked. Expect delays.

Moderate Accident

US-101 S 2 days, 22 hours ago

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

Moderate Accident

US-101 N 3 days ago

CHP : Traffic Collision with Injuries on US-101 Southbound north of CA-92 E (San Mateo). Left and center lanes blocked. Expect delays.

Moderate Accident

US-101 S 3 days, 13 hours ago

CHP : Disabled vehicle on CA-92 Westbound east of San Mateo Bridge - High Rise (Foster City). Left lane blocked. Expect delays.

Moderate Accident

CA-92 W 3 days, 15 hours ago

CHP : Traffic Collision on I-280 Northbound north of Sneath Ln (San Bruno). Left lanes blocked. Expect delays.

Moderate Accident

I-280 N 3 days, 17 hours ago

CHP : Traffic Hazard on CA-92 Eastbound east of S El Camino Real (San Mateo). Right lane affected. Expect delays.

Moderate Accident

CA-92 E 3 days, 17 hours ago

CHP : Traffic Collision on CA-92 Eastbound at US-101 N (San Mateo). Lane affected. Expect delays.

Moderate Accident

CA-92 E 3 days, 17 hours ago

CHP : Traffic Hazard on US-101 Southbound north of Ralston Ave (Belmont). Lane affected. Expect delays.

Moderate Accident

US-101 S 3 days, 18 hours ago

CHP : Traffic Hazard on I-280 Southbound north of Bunker Hill Dr (San Mateo). Left lane affected. Expect delays.

Moderate Accident

I-280 S 3 days, 19 hours ago

CHP : Residual delays on CA-92 Eastbound west of S Delaware St (San Mateo). Right shoulder affected. Expect delays.

Moderate Accident

CA-92 E 3 days, 19 hours ago

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

Moderate Accident

US-101 N 3 days, 20 hours ago

CHP : Traffic Hazard on CA-92 Westbound east of Ralston Ave (San Mateo). Lane affected. Expect delays.

Moderate Accident

CA-92 W 3 days, 20 hours ago

CHP : Traffic Collision with Injuries on US-101 Southbound north of Marsh Rd (Menlo Park). Left lanes blocked. Expect delays.

Moderate Accident

US-101 S 4 days ago

CHP : Traffic Hazard on US-101 Northbound at Whipple Ave (Redwood City). Lane affected. Expect delays.

Moderate Accident

US-101 N 4 days, 2 hours ago

CHP : Traffic Hazard on I-280 Southbound north of Sneath Ln (San Bruno). Center lanes affected. Expect delays.

Moderate Accident

I-280 S 4 days, 2 hours ago

CHP : Traffic Hazard on I-280 Northbound north of CA-92 W (San Mateo). 2nd lane from the left blocked. Expect delays.

Moderate Accident

I-280 N 4 days, 3 hours ago

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

Moderate Accident

US-101 N 4 days, 3 hours ago

CHP : Disabled vehicle on US-101 Southbound north of E Poplar Ave (San Mateo). Right shoulder affected. Expect delays.

Moderate Accident

US-101 S 4 days, 9 hours ago

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

Moderate Accident

CA-92 W 4 days, 11 hours ago

CHP : Disabled vehicle on I-280 Southbound south of Alpine Rd (Menlo Park). Right shoulder affected. Expect delays.

Moderate Accident

I-280 S 4 days, 12 hours ago

CHP : Vehicle fire on US-101 Southbound north of Broadway (Burlingame). Right shoulder affected. Expect delays.

Moderate Accident

US-101 S 4 days, 13 hours ago

CHP : Traffic Hazard on US-101 Northbound south of Dore Ave (San Mateo). Lane affected. Expect delays.

Moderate Accident

US-101 N 4 days, 15 hours ago

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

Moderate Accident

US-101 S 4 days, 15 hours ago

CHP : Traffic Collision on US-101 Northbound south of Broadway (Burlingame). Lanes blocked. Expect delays.

Moderate Accident

US-101 N 4 days, 16 hours ago

CHP : Traffic Hazard on CA-92 Eastbound west of Foster City Blvd (Foster City). 2nd lane from the left affected. Expect delays.

Moderate Accident

CA-92 E 4 days, 20 hours ago

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

Moderate Accident

CA-92 E 4 days, 22 hours ago

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

Moderate Accident

US-101 N 5 days, 3 hours ago

CHP : Traffic Collision on US-101 Southbound north of Whipple Ave (Redwood City). Right shoulder blocked. Expect delays.

Moderate Accident

US-101 S 5 days, 6 hours ago