CA · County

San Mateo Car Accidents & Crashes

San Mateo County has recorded 4,658 traffic crashes since 2024, including 9 fatal incidents. In the last 24 hours, 29 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 Aug. 1, 2026.

Breakdown by type: 73 accident.

73

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

10

Today

Reported since midnight

Today's Accidents Today's Fatalities

showing most recent 73 incidents with location data · click a marker to view details

Crash Records

San Mateo Incidents 73 results

73 accident

CHP : Disabled vehicle on US-101 Northbound south of Woodside Rd (Redwood City). Lane affected. Expect delays.

Moderate Accident

US-101 N 55 minutes ago

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

Moderate Accident

US-101 N 6 hours, 55 minutes ago

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

Moderate Accident

US-101 S 8 hours, 10 minutes ago

CHP : Disabled vehicle on I-280 Southbound north of San Bruno Ave W (San Bruno). 2nd lane from the left affected. Expect delays.

Moderate Accident

I-280 S 9 hours, 25 minutes ago

CHP : Vehicle fire on US-101 Southbound south of E Millbrae Ave (Millbrae). Lane affected. Expect delays.

Moderate Accident

US-101 S 9 hours, 55 minutes ago

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

Moderate Accident

US-101 N 9 hours, 55 minutes ago

CHP : Disabled vehicle on US-101 Northbound south of E Hillsdale Blvd (San Mateo). Right lane blocked. Expect delays.

Moderate Accident

US-101 N 10 hours, 40 minutes ago

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

Moderate Accident

US-101 S 11 hours, 55 minutes ago

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

Moderate Accident

US-101 N 12 hours, 25 minutes ago

CHP : Spill on CA-35 Southbound ramp to CA-1 N (Daly City). Connector ramp affected. Expect delays.

Moderate Accident

CA-35 S 13 hours, 25 minutes ago

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

Moderate Accident

US-101 N 23 hours, 10 minutes ago

CHP : Traffic Hazard on US-101 Southbound north of CA-92 W (San Mateo). Lane affected. Expect delays.

Moderate Accident

US-101 S 23 hours, 25 minutes ago

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

Moderate Accident

CA-92 W 23 hours, 40 minutes ago

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

Moderate Accident

CA-92 E 1 day ago

CHP : Traffic Hazard on CA-92 Westbound east of US-101 S (San Mateo). Left lane blocked. Expect delays.

Moderate Accident

CA-92 W 1 day ago

CHP : Traffic Collision on CA-84 Eastbound and Westbound south of CA-1 (San Gregorio). Lane affected. Expect delays.

Moderate Accident

CA-84 E 1 day, 6 hours ago

CHP : Traffic Collision with Injuries on I-280 Southbound north of Edgewood Rd (Unincorporated). Left lane blocked. Expect delays.

Moderate Accident

I-280 S 1 day, 12 hours ago

CHP : Traffic Collision on I-280 Southbound north of Sand Hill Rd (Menlo Park). Left lanes blocked. Expect delays.

Moderate Accident

I-280 S 1 day, 23 hours ago

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

Moderate Accident

CA-92 W 2 days ago

CHP : Traffic Collision on US-101 Southbound west of Woodside Rd (Redwood City). Lane blocked. Expect delays.

Moderate Accident

US-101 S 2 days ago

CHP : Brush fire on US-101 Southbound north of Whipple Ave (Redwood City). Right shoulder affected. Expect delays.

Moderate Accident

US-101 S 2 days, 2 hours ago

CHP : Traffic Collision on US-101 Southbound south of Brittan Ave (San Carlos). Right shoulder affected. Expect delays.

Moderate Accident

US-101 S 2 days, 8 hours ago

CHP : Traffic Hazard on US-101 Southbound north of Sister Cities Blvd (South San Francisco). Lane blocked. Expect delays.

Moderate Accident

US-101 S 2 days, 12 hours ago

CHP : Traffic Collision on US-101 Northbound at Ralston Ave (Belmont). Center lanes blocked. Expect delays.

Moderate Accident

US-101 N 2 days, 14 hours ago

CHP : Traffic Hazard on US-101 Northbound entering at Woodside Rd (Redwood City). Right lane affected. Expect delays.

Moderate Accident

US-101 N 2 days, 16 hours ago

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

Moderate Accident

CA-35 N 2 days, 22 hours 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 2 days, 23 hours ago

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

Moderate Accident

US-101 N 3 days, 2 hours 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 3 days, 12 hours ago

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

Moderate Accident

US-101 S 3 days, 12 hours 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 3 days, 13 hours 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 3 days, 15 hours 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 3 days, 16 hours 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 3 days, 16 hours ago

Injury crash — 1 injured, rear-end on 101 NB

Moderate Accident

101 NB 3 days, 21 hours 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 4 days ago

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

Moderate Accident

US-101 N 4 days, 2 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 4 days, 2 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 4 days, 4 hours ago

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

Moderate Accident

I-280 S 4 days, 11 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 4 days, 13 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 4 days, 15 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 4 days, 15 hours ago

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

Moderate Accident

US-101 S 4 days, 15 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 4 days, 15 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 4 days, 16 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 4 days, 16 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 4 days, 16 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 4 days, 21 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 4 days, 23 hours ago