CA · County

San Mateo Car Accidents & Crashes

San Mateo County has recorded 4,581 traffic crashes since 2024, including 9 fatal incidents. In the last 24 hours, 30 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 29, 2026.

Breakdown by type: 327 accident.

327

Total Crashes

Filtered results

9

Fatalities

Fatal injury reports

1

Today

Reported since midnight

Today's Accidents Today's Fatalities

showing most recent 327 incidents with location data · click a marker to view details

Crash Records

San Mateo Incidents 327 results

327 accident

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 13 hours, 58 minutes ago

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

US-101 S 23 hours, 43 minutes 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 1 day, 14 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 1 day, 16 hours ago

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

CA-92 W 1 day, 17 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 1 day, 23 hours 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 2 days, 2 hours ago

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

US-101 S 2 days, 15 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 2 days, 17 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 2 days, 20 hours ago

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

US-101 S 3 days, 4 hours ago

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

CA-84 E 3 days, 9 hours ago

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

CA-1 N 3 days, 10 hours ago

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

CA-84 W 3 days, 16 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 3 days, 21 hours ago

CHP : Traffic Collision with Injuries on CA-1 Northbound at Capistrano Rd (El Granada). Lanes blocked. Expect delays.

CA-1 N 6 days, 15 hours ago

CHP : Fire on CA-1 Southbound ramp to Skyline Blvd (Daly City). Lanes affected. Expect delays.

CA-1 S 6 days, 15 hours ago

CHP : Vehicle fire on CA-1 Southbound north of Old Devil's Slide Hwy (Pacifica). Right shoulder affected. Expect delays.

CA-1 S 1 week ago

CHP : Traffic Hazard on I-280 Southbound ramp to CA-92 W (San Mateo). Connector ramp affected. Expect delays.

I-280 S 1 week ago

CHP : Traffic Collision on I-280 Northbound at Westborough Blvd (South San Francisco). Off Ramp affected. Expect delays.

I-280 N 1 week, 2 days ago

CHP : Traffic Collision with Injuries on I-280 Northbound entering at John Daly Blvd (Daly City). On Ramp affected. Expect delays.

I-280 N 1 week, 2 days ago

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

CA-92 E 1 week, 2 days ago

CHP : Traffic Collision on CA-1 Northbound ramp to Skyline Blvd (Daly City). Connector ramp affected. Expect delays.

CA-1 N 1 week, 2 days ago

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

CA-92 E 1 week, 2 days ago

CHP : Traffic Hazard on CA-92 Eastbound east of Upper Skyline Blvd (Unincorporated). Lanes blocked. Expect delays.

CA-92 E 1 week, 3 days ago

CHP : Traffic Collision on CA-92 Eastbound at Lemos Farms Rd (Unincorporated). Lane blocked. Expect delays.

CA-92 E 1 week, 4 days ago

CHP : Severe traffic alert on US-101 Southbound north of San Bruno Ave E (San Bruno). Lanes blocked. Expect delays.

US-101 S 1 week, 5 days ago

CHP : Disabled vehicle on CA-1 Northbound at Carlos St (Moss Beach). Lane blocked. Expect delays.

CA-1 N 1 week, 5 days ago

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

CA-92 W 1 week, 5 days ago

CHP : Severe traffic alert and Traffic Collision on US-101 Southbound north of E Poplar Ave (San Mateo). Left lanes blocked. Expect delays.

US-101 S 1 week, 5 days ago

CHP : Traffic Hazard on CA-84 Eastbound east of Dumbarton Bridge - Midspan (Fremont). Lane blocked. Expect delays.

CA-84 E 1 week, 6 days ago

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

I-280 N 1 week, 6 days ago

CHP : Traffic Collision with Injuries and Vehicle fire and Downed wires on CA-92 Eastbound exiting at Alameda De Las Pulgas (San Mateo). Off Ramp closed. Expect delays.

CA-92 E 2 weeks ago

CHP : Traffic Hazard on CA-1 Northbound north of Carlos St (Moss Beach). Lane affected. Expect delays.

CA-1 N 2 weeks ago

CHP : Brush fire on CA-1 Southbound at Swanton Rd (Unincorporated). Lane affected. Expect delays.

CA-1 S 2 weeks ago

CHP : Traffic Collision on US-101 Southbound at I-380 W (South San Francisco). On Ramp affected. Expect delays.

US-101 S 2 weeks, 2 days ago

CHP : Fire on US-101 Southbound at Whipple Ave (Redwood City). Off Ramp affected. Expect delays.

US-101 S 2 weeks, 3 days ago

CHP : Traffic Hazard on CA-1 Northbound south of Carlos St (Moss Beach). Right shoulder affected. Expect delays.

CA-1 N 2 weeks, 3 days ago

CHP : Disabled vehicle on CA-84 Eastbound west of Dumbarton Bridge - Midspan (Fremont). Left lane affected. Expect delays.

CA-84 E 2 weeks, 3 days ago

CHP : Traffic Collision with Injuries on I-280 Northbound north of Edgewood Rd (Unincorporated). Off Ramp affected. Expect delays.

I-280 N 2 weeks, 3 days ago

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

CA-92 W 2 weeks, 4 days ago

CHP : Severe traffic alert and Traffic Collision with Injuries on US-101 Northbound south of Ralston Ave (Belmont). Left and center lanes blocked. Expect delays.

US-101 N 2 weeks, 4 days ago

CHP : Disabled vehicle on CA-92 Westbound exiting at Ralston Ave (San Mateo). Off Ramp blocked. Expect delays.

CA-92 W 2 weeks, 5 days ago

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

I-280 S 2 weeks, 6 days ago

CHP : Disabled vehicle on I-280 Northbound exiting at Trousdale Dr (Burlingame). Off Ramp blocked. Expect delays.

I-280 N 2 weeks, 6 days ago

CHP : Severe traffic alert and Traffic Collision with Injuries on US-101 Northbound south of Ralston Ave (Belmont). Right and center lanes blocked. Expect delays.

US-101 N 3 weeks ago

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

CA-92 W 3 weeks ago

CHP : Traffic Collision with Injuries on CA-84 Eastbound east of University Ave (Menlo Park). Right shoulder affected. Expect delays.

CA-84 E 3 weeks, 1 day ago

CHP : High winds on CA-92 Eastbound and Westbound at San Mateo Bridge - High Rise (Foster City). Lanes affected. Traffic advisory in effect.

CA-92 W 3 weeks, 1 day ago

CHP : Traffic Hazard on CA-92 Eastbound at San Mateo Bridge - Eastbound Causeway (Foster City). 3rd lane from the left affected. Expect delays.

CA-92 E 3 weeks, 1 day ago