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San Mateo Car Accidents & Crashes

San Mateo County has recorded 4,582 traffic crashes since 2024, including 9 fatal incidents. In the last 24 hours, 31 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: 2,156 accident.

2,156

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

8

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 2,156 results

2156 accident

CHP : Traffic Collision with Injuries on CA-35 Northbound at Alpine Rd (Unincorporated). Lane affected. Expect delays.

Moderate Accident

CA-35 N 4 hours, 25 minutes ago

CHP : Residual delays on US-101 Southbound north of E Hillsdale Blvd (San Mateo). Right shoulder affected. Expect delays.

Moderate Accident

US-101 S 5 hours, 25 minutes ago

CHP : Traffic Collision on US-101 Northbound south of Kehoe Ave (San Mateo). Left lane blocked. Expect delays.

Moderate Accident

US-101 N 7 hours, 55 minutes ago

CHP : Traffic Hazard on I-280 Southbound north of I-280 S-CA-1 S Join (Daly City). Lane affected. Expect delays.

Moderate Accident

I-280 S 18 hours, 10 minutes ago

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

Moderate Accident

US-101 S 18 hours, 25 minutes ago

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

Moderate Accident

US-101 N 19 hours, 25 minutes ago

CHP : Traffic Collision on US-101 Northbound north of E 3RD Ave (San Mateo). Left lanes blocked. Expect delays.

Moderate Accident

US-101 N 20 hours, 55 minutes ago

CHP : Traffic Hazard on I-280 Southbound north of I-280 S-CA-92 W Ramp (San Mateo). Center lanes affected. Expect delays.

Moderate Accident

I-280 S 21 hours, 40 minutes ago

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

Moderate Accident

US-101 N 21 hours, 55 minutes ago

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

Moderate Accident

US-101 S 1 day, 6 hours ago

CHP : Traffic Hazard on US-101 Northbound south of Broadway (Burlingame). Left lane blocked. Expect delays.

Moderate Accident

US-101 N 1 day, 7 hours ago

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

Moderate Accident

US-101 S 1 day, 7 hours ago

CHP : Traffic Hazard on I-380 Eastbound west of US-101 S (South San Francisco). Lane affected. Expect delays.

Moderate Accident

I-380 E 1 day, 10 hours ago

CHP : Traffic Hazard on I-280 Southbound north of Trousdale Dr (Burlingame). Lane affected. Expect delays.

Moderate Accident

I-280 S 1 day, 17 hours ago

CHP : Traffic Hazard on US-101 Southbound north of I-380 W (South San Francisco). 4th lane from the left blocked. Expect delays.

Moderate Accident

US-101 S 1 day, 18 hours ago

CHP : Traffic Hazard on I-280 Northbound south of CA-92 E (San Mateo). Right and center lanes blocked. Expect delays.

Moderate Accident

I-280 N 1 day, 20 hours ago

CHP : Traffic Hazard on US-101 Southbound north of Broadway (Burlingame). Lane affected. Expect delays.

Moderate Accident

US-101 S 1 day, 21 hours ago

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

Moderate Accident

I-280 N 1 day, 21 hours ago

CHP : Disabled vehicle on US-101 Northbound south of E Millbrae Ave (Millbrae). 2nd lane from the left blocked. Expect delays.

Moderate Accident

US-101 N 1 day, 21 hours ago

CHP : Traffic Hazard on US-101 Northbound south of E Millbrae Ave (Millbrae). Left and center lanes affected. Expect delays.

Moderate Accident

US-101 N 1 day, 21 hours ago

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

Moderate Accident

I-280 N 1 day, 21 hours ago

CHP : Disabled vehicle on US-101 Southbound north of Broadway (Burlingame). 2nd lane from the left blocked. Expect delays.

Moderate Accident

US-101 S 1 day, 22 hours ago

CHP : Brush fire on CA-84 Eastbound and Westbound north of CA-1 (San Gregorio). Right shoulder affected. Expect delays.

Moderate Accident

CA-84 E 2 days, 3 hours ago

CHP : Disabled vehicle on US-101 Northbound south of Peninsula Ave (San Mateo). Right lane affected. Expect delays.

Moderate Accident

US-101 N 2 days, 4 hours ago

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

Moderate Accident

CA-92 W 2 days, 5 hours ago

CHP : Disabled vehicle on CA-92 Westbound east of San Mateo Bridge - High Rise (Foster City). 2nd lane from the left affected. Expect delays.

Moderate Accident

CA-92 W 2 days, 16 hours ago

CHP : Traffic Hazard on US-101 Southbound at University Ave (East Palo Alto). Lane blocked. Expect delays.

Moderate Accident

US-101 S 2 days, 19 hours ago

CHP : Traffic Collision on I-280 Northbound north of Collins Ave (Daly City). Right lane blocked. Expect delays.

Moderate Accident

I-280 N 2 days, 21 hours ago

CHP : Traffic Collision on US-101 Northbound south of Ralston Ave (Belmont). Lane blocked. Expect delays.

Moderate Accident

US-101 N 3 days, 3 hours ago

CHP : Traffic Hazard on I-380 Eastbound exiting at S Airport Blvd (South San Francisco). Left lane blocked. Expect delays.

Moderate Accident

I-380 E 3 days, 4 hours ago

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

Moderate Accident

CA-92 W 3 days, 4 hours ago

CHP : Brush fire on CA-1 Southbound north of Alemany Blvd (Daly City). Right shoulder affected. Expect delays.

Moderate Accident

CA-1 S 3 days, 5 hours ago

CHP : Fire on I-280 Southbound north of Washington St (Daly City). Right shoulder affected. Expect delays.

Moderate Accident

I-280 S 3 days, 5 hours ago

CHP : Downed tree on CA-35 Northbound north of Kings Mountain Rd (Unincorporated). Lanes blocked. Expect delays.

Moderate Accident

CA-35 N 3 days, 6 hours ago

CHP : Disabled vehicle on I-280 Southbound south of CA-92 E (San Mateo). Lane affected. Expect delays.

Moderate Accident

I-280 S 3 days, 8 hours ago

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

Moderate Accident

US-101 S 3 days, 9 hours ago

CHP : Fire on US-101 Southbound north of Woodside Rd (Redwood City). Lane affected. Expect delays.

Moderate Accident

US-101 S 3 days, 10 hours ago

CHP : Traffic Collision on CA-84 Eastbound at US-101 S (Redwood City). Lane affected. Expect delays.

Moderate Accident

CA-84 E 3 days, 19 hours ago

CHP : Traffic Collision on US-101 Southbound north of Willow Rd (Menlo Park). Lane blocked. Expect delays.

Moderate Accident

US-101 S 3 days, 20 hours ago

CHP : Traffic Collision on CA-92 Westbound east of US-101 N (San Mateo). Right shoulder affected. Expect delays.

Moderate Accident

CA-92 W 3 days, 20 hours ago

CHP : Traffic Collision on I-280 Southbound at Westborough Blvd (South San Francisco). Right shoulder affected. Expect delays.

Moderate Accident

I-280 S 3 days, 21 hours ago

CHP : Disabled vehicle on I-280 Northbound south of CA-92 E (San Mateo). Lane blocked. Expect delays.

Moderate Accident

I-280 N 3 days, 22 hours ago

CHP : Traffic Collision on US-101 Northbound at Dore Ave (San Mateo). Left lanes blocked. Expect delays.

Moderate Accident

US-101 N 3 days, 23 hours ago

CHP : Residual delays on US-101 Northbound south of Anza Blvd (Burlingame). Right shoulder affected. Expect delays.

Moderate Accident

US-101 N 3 days, 23 hours ago

CHP : Disabled vehicle on CA-92 Westbound east of W Hillsdale Blvd (San Mateo). Right lane blocked. Expect delays.

Moderate Accident

CA-92 W 4 days, 1 hour ago

CHP : Traffic Collision on I-280 Northbound north of Westborough Blvd (South San Francisco). Right lane blocked. Expect delays.

Moderate Accident

I-280 N 4 days, 1 hour ago

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

Moderate Accident

I-280 S 4 days, 5 hours ago

CHP : Traffic Hazard on US-101 Northbound south of University Ave (East Palo Alto). Left lane blocked. Expect delays.

Moderate Accident

US-101 N 4 days, 5 hours ago

CHP : Disabled vehicle on I-380 Westbound east of El Camino Real (San Bruno). Center lanes blocked. Expect delays.

Moderate Accident

I-380 W 4 days, 8 hours ago

CHP : Traffic Hazard on I-380 Westbound at S Airport Blvd (South San Francisco). Right shoulder affected. Expect delays.

Moderate Accident

I-380 W 4 days, 8 hours ago