CA · County

San Mateo Car Accidents & Crashes

San Mateo County has recorded 6,574 traffic crashes since 2024, including 10 fatal incidents. In the last 24 hours, 26 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. 27, 2026.

Breakdown by type: 121 accident, 52 construction.

173

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

15

Today

Reported since midnight

Today's Accidents Today's Fatalities

showing most recent 173 incidents with location data · click a marker to view details

Crash Records

San Mateo Incidents 173 results

121 accident 52 construction

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

Moderate Accident

US-101 N 5 minutes ago Live

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 5 minutes ago Live

CHP : Severe traffic alert and Traffic Collision and Overturned vehicle on US-101 Northbound south of CA-92 W (San Mateo). Left and center lanes blocked. Expect delays.

US-101 N 5 minutes ago Live

Caltrans : Roadwork on CA-82 Southbound between Trousdale Dr (Burlingame) and Hillside Dr (Burlingame). Lane closed until 6 PM. From 11:30 AM Friday, August 21, 2026 to 6:00 PM Friday, October 30, 2026.

CA-82 S 20 minutes ago

Caltrans : Roadwork on CA-35 Southbound at La Honda Rd (Woodside). Lane closed. One way traffic control in effect. From 9:00 AM Tuesday, October 27, 2026 to 3:00 PM Tuesday, October 27, 2026.

CA-35 S 20 minutes ago

Caltrans : Emergency construction on CA-1 Southbound at Santa Cruz County Line (Unincorporated). Lane closed. One way traffic control in effect. From 7:00 AM Tuesday, October 27, 2026 to 4:00 PM Tuesday, October 27, 2026.

CA-1 S 20 minutes ago

Caltrans : Roadwork on CA-35 Southbound at Alpine Rd (Unincorporated). Lane closed. One way traffic control in effect. From 9:00 AM Tuesday, October 27, 2026 to 3:00 PM Tuesday, October 27, 2026.

CA-35 S 20 minutes ago

Caltrans : Roadwork on CA-82 Northbound between Hillside Dr (Burlingame) and Trousdale Dr (Burlingame). Lane closed until 6 PM. From 11:30 AM Friday, August 21, 2026 to 6:00 PM Friday, October 30, 2026.

CA-82 N 20 minutes ago

CHP : Residual delays on CA-92 Eastbound west of Alameda De Las Pulgas (San Mateo). Center Divider affected. Expect delays.

CA-92 E 35 minutes ago

CHP : Traffic Collision on US-101 Northbound entering at CA-92 W (San Mateo). On Ramp affected. Expect delays.

US-101 N 1 hour, 20 minutes ago

Caltrans : Roadwork on US-101 Northbound exiting at E Hillsdale Blvd (San Mateo). Off Ramp closed until 7 AM. From 10:00 PM Monday, October 26, 2026 to 7:00 AM Tuesday, October 27, 2026.

US-101 N 3 hours, 5 minutes ago

Caltrans : Roadwork on CA-35 Northbound at Westmoor Ave (Daly City). Lane closed until 3 PM. From 8:00 PM Monday, October 26, 2026 to 3:00 PM Tuesday, October 27, 2026.

CA-35 N 7 hours, 20 minutes ago

Caltrans : Roadwork on CA-82 Northbound at Whipple Ave (Redwood City). Lane closed until midnight. From 12:00 AM Monday, October 26, 2026 to 12:00 AM Tuesday, October 27, 2026.

CA-82 N 10 hours, 5 minutes ago

CHP : Traffic Collision on CA-92 Eastbound east of Main St (Half Moon Bay). Lane affected. Expect delays.

CA-92 E 11 hours, 50 minutes 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 13 hours, 20 minutes 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 15 hours, 5 minutes ago

Caltrans : Roadwork on CA-82 Southbound between Oak Grove Ave (Burlingame) and Peninsula Ave (Burlingame). All lanes closed until 6 PM. From 9:00 AM Monday, October 26, 2026 to 6:00 PM Monday, October 26, 2026.

CA-82 S 16 hours, 5 minutes ago

Caltrans : Roadwork on CA-82 Northbound between Peninsula Ave (Burlingame) and Oak Grove Ave (Burlingame). All lanes closed until 6 PM. From 9:00 AM Monday, October 26, 2026 to 6:00 PM Monday, October 26, 2026.

CA-82 N 16 hours, 5 minutes ago

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

Moderate Accident

I-280 N 17 hours, 20 minutes 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 17 hours, 35 minutes ago

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

Moderate Accident

CA-92 E 17 hours, 50 minutes ago

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

Moderate Accident

US-101 S 18 hours, 50 minutes 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 19 hours, 35 minutes 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 19 hours, 50 minutes 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 20 hours, 35 minutes ago

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

Moderate Accident

CA-92 W 20 hours, 35 minutes ago

Caltrans : Roadwork on I-280 Southbound at Crystal Springs Rd (San Bruno). Lane closed until 3 PM. From 9:00 AM Monday, October 26, 2026 to 3:00 PM Monday, October 26, 2026.

I-280 S 22 hours, 35 minutes ago

Caltrans : Emergency construction on CA-1 Southbound at Santa Cruz County Line (Unincorporated). Lane closed. One way traffic control in effect. From 7:00 AM Monday, October 26, 2026 to 4:00 PM Monday, October 26, 2026.

CA-1 S 22 hours, 35 minutes 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 1 day ago

CHP : Disabled vehicle on CA-92 Eastbound west of San Mateo Bridge - High Rise (Foster City). Right lane blocked. Expect delays.

CA-92 E 1 day, 1 hour ago

CHP : Traffic Hazard on CA-1 Northbound south of Higgins Canyon Rd (Half Moon Bay). Lanes affected. Expect delays.

CA-1 N 1 day, 1 hour ago

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

Moderate Accident

US-101 N 1 day, 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 1 day, 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 1 day, 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 1 day, 3 hours ago

Caltrans : Roadwork on CA-82 Southbound between Broadway St (Redwood City) and Jefferson Ave (Redwood City). Lane closed until 5 AM. From 9:00 PM Sunday, October 25, 2026 to 5:00 AM Monday, October 26, 2026.

CA-82 S 1 day, 4 hours ago

Caltrans : Roadwork on CA-82 Southbound between John Daly Blvd (Daly City) and School St (Daly City). Lane closed until 5 AM. From 9:00 PM Sunday, October 25, 2026 to 5:00 AM Monday, October 26, 2026.

CA-82 S 1 day, 4 hours ago

Caltrans : Roadwork on US-101 Northbound exiting at E Hillsdale Blvd (San Mateo). Off Ramp closed until 7 AM. From 8:00 PM Sunday, October 25, 2026 to 7:00 AM Monday, October 26, 2026.

US-101 N 1 day, 9 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 1 day, 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 1 day, 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 1 day, 12 hours ago

CHP : Disabled vehicle on US-101 Northbound at Willow Rd (Menlo Park). Off Ramp blocked. Expect delays.

US-101 N 1 day, 13 hours ago

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

Moderate Accident

US-101 S 1 day, 13 hours ago

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

US-101 S 1 day, 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 1 day, 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 1 day, 15 hours ago

CHP : Traffic Collision with Injuries on CA-35 Northbound at CA-1 N (Daly City). Lane affected. Expect delays.

CA-35 N 1 day, 16 hours ago

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

Moderate Accident

US-101 N 1 day, 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 1 day, 20 hours ago

CHP : Traffic Collision on I-280 Southbound north of Golf Course Dr (Unincorporated). Center Divider affected. Expect delays.

I-280 S 1 day, 21 hours ago