San Mateo · Last 48 Hours

San Mateo Accidents Today

26 accidents near San Mateo in the last 24 hours · 44 in 48 hours · updated Oct. 27, 2026 4:44 AM PDT

26

Last 24h

44

Last 48h

6

High Severity

147

This Week

33

Accident

11

Construction

7-Day Trend

147 crashes

↓ Fewer than last week

147 crashes in the last 7 days, down 11% vs the previous week.

Last 6 hours

1 incident

5h ago 11:00 PM

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.

6–12 hours ago

5 incidents

CHP : Traffic Collision with Injuries on US-101 Southbound north of CA-92 E (San Mateo). Left and center lanes blocked. Expect delays.

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.

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.

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

10h ago 6:30 PM

CHP : Disabled vehicle on CA-92 Westbound east of San Mateo Bridge - High Rise (Foster City). Left lane blocked. Expect delays.

12–24 hours ago

20 incidents

12h ago 4:30 PM

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

13h ago 3:30 PM

CHP : Traffic Hazard on CA-92 Eastbound east of S El Camino Real (San Mateo). Right lane affected. Expect delays.

13h ago 3:00 PM

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

13h ago 3:00 PM

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

14h ago 2:00 PM

CHP : Residual delays on CA-92 Eastbound west of S Delaware St (San Mateo). Right shoulder affected. Expect delays.

14h ago 2:00 PM

CHP : Traffic Hazard on I-280 Southbound north of Bunker Hill Dr (San Mateo). Left lane affected. Expect delays.

15h ago 1:15 PM

CHP : Traffic Hazard on US-101 Northbound south of Oyster Point Blvd (South San Francisco). Right lane affected. Expect delays.

15h ago 1:15 PM

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

17h ago 11:15 AM

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.

17h ago 10:45 AM

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.

17h ago 10:45 AM

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.

19h ago 9:15 AM

CHP : Traffic Collision with Injuries on US-101 Southbound north of Marsh Rd (Menlo Park). Left lanes blocked. Expect delays.

20h ago 8:15 AM

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

20h ago 8:00 AM

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

21h ago 7:15 AM

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.

21h ago 7:15 AM

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.

21h ago 7:00 AM

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

22h ago 6:30 AM

CHP : Traffic Hazard on I-280 Southbound north of Sneath Ln (San Bruno). Center lanes affected. Expect delays.

22h ago 6:15 AM

CHP : Traffic Hazard on US-101 Northbound south of Whipple Ave (Redwood City). Center lanes affected. Expect delays.

22h ago 5:45 AM

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

24–48 hours ago

18 incidents

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.

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.

1d ago 12:15 AM

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.

1d ago 11:15 PM

CHP : Disabled vehicle on US-101 Southbound north of E Poplar Ave (San Mateo). Right shoulder affected. Expect delays.

1d ago 10:00 PM

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

CHP : Disabled vehicle on I-280 Southbound south of Alpine Rd (Menlo Park). Right shoulder affected. Expect delays.

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

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

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

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

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

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

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

CHP : Traffic Hazard on CA-92 Eastbound west of Foster City Blvd (Foster City). 2nd lane from the left affected. Expect delays.

1d ago 12:00 PM

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

1d ago 11:15 AM

CHP : Traffic Hazard on CA-92 Eastbound west of W Hillsdale Blvd (San Mateo). Right lane affected. Expect delays.

1d ago 10:00 AM

CHP : Disabled vehicle on CA-92 Eastbound west of S El Camino Real (San Mateo). Center Divider affected. Expect delays.

CHP : Traffic Collision on US-101 Southbound at E Millbrae Ave (Millbrae). On Ramp affected. Expect delays.

Frequently Asked Questions

Are accidents in San Mateo reported live?

Yes — this page refreshes throughout the day as new incidents are logged by the California Highway Patrol. Crash data typically appears within 15–30 minutes of being reported.

How many accidents happened near San Mateo in the last 7 days?

147 crashes were reported near San Mateo in the last 7 days.

What roads have the most crashes in San Mateo today?

Recent crashes near San Mateo are concentrated on: US-101 S, CA-92 E, US-101 N. See the full historical crash data for San Mateo.

What type of accident is most common in San Mateo?

Accident are the most frequently reported incident type near San Mateo based on recent data.

Where does this crash data come from?

Crash data is sourced from the California Highway Patrol (CHP) Computer-Aided Dispatch feed and the CCRS historical crash database. Learn more about our data sources.