CA · County

San Mateo Car Accidents & Crashes

San Mateo County has recorded 4,545 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 28, 2026.

Breakdown by type: 3,886 accident, 659 construction.

4,545

Total Crashes

All time records

9

Fatalities

Fatal injury reports

26

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

3886 accident 659 construction

Caltrans : Long-term construction on CA-82 Northbound between E Poplar Ave (San Mateo) and Peninsula Ave (Burlingame). Lane closed until 6 PM. From 5:00 PM Tuesday, May 12, 2026 to 6:00 PM Friday, August 28, 2026.

CA-82 N 0 minutes ago Live

Caltrans : Roadwork on CA-82 Southbound between Broadway (Burlingame) and Oak Grove Ave (Burlingame). Lane closed until 5 PM. From 4:00 PM Monday, June 15, 2026 to 5:00 PM Friday, August 28, 2026.

CA-82 S 0 minutes ago Live

Caltrans : Long-term construction on CA-82 Southbound between Peninsula Ave (Burlingame) and E Poplar Ave (San Mateo). Lane closed until 6 PM. From 5:00 PM Tuesday, May 12, 2026 to 6:00 PM Friday, August 28, 2026.

CA-82 S 0 minutes ago Live

Caltrans : Roadwork on CA-82 Northbound between Oak Grove Ave (Burlingame) and Broadway (Burlingame). Lane closed until 5 PM. From 4:00 PM Monday, June 15, 2026 to 5:00 PM Friday, August 28, 2026.

CA-82 N 0 minutes ago Live

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

US-101 S 5 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 6 hours, 15 minutes ago

Caltrans : Roadwork on CA-1 Southbound at Bonny Doon Rd (Unincorporated). Lane closed. One way traffic control in effect. From 7:00 AM Tuesday, July 28, 2026 to 5:00 PM Tuesday, July 28, 2026.

CA-1 S 7 hours, 30 minutes ago

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

Moderate Accident

US-101 N 8 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 8 hours ago

Caltrans : Roadwork on CA-1 Southbound at Higgins Canyon Rd (Half Moon Bay). Lane closed until 7 AM. From 6:00 PM Monday, July 27, 2026 to 7:00 AM Tuesday, July 28, 2026.

CA-1 S 8 hours, 45 minutes ago

Caltrans : Roadwork on CA-1 Northbound at Higgins Canyon Rd (Half Moon Bay). Lane closed until 7 AM. From 6:00 PM Monday, July 27, 2026 to 7:00 AM Tuesday, July 28, 2026.

CA-1 N 8 hours, 45 minutes ago

Caltrans : Roadwork on CA-1 Southbound at Capistrano Rd (El Granada). Lane closed until 7 AM. From 7:00 PM Monday, July 27, 2026 to 7:00 AM Tuesday, July 28, 2026.

CA-1 S 8 hours, 45 minutes ago

Caltrans : Roadwork on CA-1 Northbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 8:00 PM Monday, July 27, 2026 to 6:00 AM Tuesday, July 28, 2026.

CA-1 N 9 hours ago

Caltrans : Roadwork on CA-82 Southbound between John Daly Blvd (Daly City) and School St (Daly City). Various lanes closed until 6 AM. From 8:00 PM Monday, July 27, 2026 to 6:00 AM Tuesday, July 28, 2026.

CA-82 S 9 hours ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Monday, July 27, 2026 to 6:00 AM Tuesday, July 28, 2026.

CA-1 S 10 hours, 15 minutes ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Monday, July 27, 2026 to 6:00 AM Tuesday, July 28, 2026.

CA-1 S 10 hours, 15 minutes 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 10 hours, 15 minutes ago

Caltrans : Roadwork on CA-1 Southbound at Higgins Canyon Rd (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Monday, July 27, 2026 to 6:00 AM Tuesday, July 28, 2026.

CA-1 S 10 hours, 15 minutes ago

Caltrans : Roadwork on CA-1 Southbound at Capistrano Rd (El Granada). Lane closed until 6 AM. From 10:00 PM Monday, July 27, 2026 to 6:00 AM Tuesday, July 28, 2026.

CA-1 S 10 hours, 45 minutes ago

Caltrans : Roadwork on US-101 Northbound between CA-92 E (San Mateo) and E 3RD Ave (San Mateo). Various lanes closed until 5 AM. From 10:00 PM Monday, July 27, 2026 to 5:00 AM Tuesday, July 28, 2026.

US-101 N 12 hours ago

Caltrans : Roadwork on US-101 Southbound between CA-92 E (San Mateo) and E Hillsdale Blvd (San Mateo). Various lanes closed until 5 AM. From 8:00 PM Monday, July 27, 2026 to 5:00 AM Tuesday, July 28, 2026.

US-101 S 12 hours ago

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

Moderate Accident

I-280 S 17 hours, 30 minutes 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 18 hours, 45 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 19 hours, 45 minutes ago

CHP : Residual delays on US-101 Northbound south of Peninsula Ave (San Mateo). All lanes open. Expect delays.

US-101 N 20 hours, 45 minutes 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 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 21 hours, 15 minutes ago

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

Moderate Accident

US-101 S 21 hours, 15 minutes 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 21 hours, 30 minutes 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 21 hours, 45 minutes 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 21 hours, 45 minutes 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 22 hours, 15 minutes 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 22 hours, 30 minutes ago

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

CA-92 W 23 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 1 day, 3 hours ago

CHP : Residual delays on US-101 Northbound exiting at Woodside Rd (Redwood City). All lanes open. Expect delays.

US-101 N 1 day, 4 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 1 day, 4 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, 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 1 day, 5 hours ago

Caltrans : Roadwork on CA-1 Southbound at Swanton Rd (Unincorporated). Lane closed. One way traffic control in effect. From 7:00 AM Monday, July 27, 2026 to 5:00 PM Monday, July 27, 2026.

CA-1 S 1 day, 5 hours ago

CHP : Residual delays on CA-92 Westbound east of S Delaware St (San Mateo). All lanes open. Expect delays.

CA-92 W 1 day, 5 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 1 day, 8 hours ago

Caltrans : Roadwork on CA-82 Southbound between John Daly Blvd (Daly City) and School St (Daly City). Various lanes closed until 6 AM. From 8:00 PM Sunday, July 26, 2026 to 6:00 AM Monday, July 27, 2026.

CA-82 S 1 day, 9 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 1 day, 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 1 day, 20 hours ago

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

US-101 S 1 day, 21 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 1 day, 21 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 1 day, 22 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, 2 hours ago

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

Moderate Accident

US-101 N 2 days, 3 hours ago