CA · Highway

US-101 S Accidents & Crashes

US-101 S has recorded 3,450 traffic crashes in California since 2024, with no fatalities on record. In the last 24 hours, 20 new crashes were reported. The highest crash volumes are concentrated near Santa Clara and Marin.

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. Records include crash severity, injury data, vehicle information, and precise geographic coordinates. Last updated Oct. 27, 2026.

Breakdown by type: 390 accident, 87 construction.

477

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

9

Today

Reported since midnight

Today's Accidents Today's Fatalities

Crash locations on US-101 S. Click a marker to view details.

Crash Records

US-101 S Incidents 477 results

390 accident 87 construction

Caltrans : Roadwork on US-101 Southbound entering at Lincoln Ave (San Rafael). On Ramp closed until 7 AM. From 12:00 AM Tuesday, October 27, 2026 to 7:00 AM Tuesday, October 27, 2026.

Marin 12 minutes ago Live

CHP : Traffic Collision with Injuries on US-101 Southbound south of E San Martin Ave (San Martin). 2nd lane from the left affected. Expect delays.

Moderate Accident

Santa Clara 4 hours, 12 minutes ago

CHP : Traffic Collision on US-101 Southbound north of San Antonio Rd (Unincorporated). Right shoulder affected. Expect delays.

Moderate Accident

Marin 4 hours, 27 minutes ago

CHP : Traffic Hazard on US-101 Southbound north of Miller Creek Rd (Unincorporated). Right shoulder affected. Expect delays.

Moderate Accident

Marin 5 hours, 12 minutes ago

Caltrans : Roadwork on US-101 Southbound entering at N San Pedro Rd (San Rafael). On Ramp closed until midnight. From 7:00 PM Monday, October 26, 2026 to 12:00 AM Tuesday, October 27, 2026.

Marin 6 hours, 57 minutes ago

Caltrans : Roadwork on US-101 Southbound exiting at Lincoln Ave (San Rafael). Off Ramp closed until midnight. From 7:00 PM Monday, October 26, 2026 to 12:00 AM Tuesday, October 27, 2026.

Marin 6 hours, 57 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

San Mateo 10 hours, 12 minutes ago

CHP : Traffic Hazard on US-101 Southbound at CA-12 W (Santa Rosa). Off Ramp affected. Expect delays.

Sonoma 11 hours, 27 minutes ago

CHP : Traffic Hazard on US-101 Southbound at CA-25 (Gilroy). Right shoulder affected. Expect delays.

Moderate Accident

Santa Clara 12 hours, 42 minutes ago

CHP : Traffic Hazard on US-101 Southbound north of San Tomas Expy (Santa Clara). Left and center lanes blocked. Expect delays.

Moderate Accident

Santa Clara 13 hours, 57 minutes ago

CHP : Disabled truck on US-101 Southbound north of E Blithedale Ave (Mill Valley). Right lane blocked. Expect delays.

Moderate Accident

Marin 14 hours, 42 minutes ago

CHP : Traffic Hazard on US-101 Southbound north of 3RD St (San Rafael). 3rd lane from the left affected. Expect delays.

Moderate Accident

Marin 15 hours, 12 minutes ago

CHP : Flooding on US-101 Southbound entering at Hamilton Dr (Mill Valley). On Ramp affected. Expect delays.

Marin 15 hours, 27 minutes ago

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

Moderate Accident

San Mateo 15 hours, 42 minutes ago

CHP : Traffic Hazard on US-101 Southbound north of Petaluma Blvd N (Petaluma). Left lane blocked. Expect delays.

Moderate Accident

Sonoma 16 hours, 27 minutes ago

CHP : Traffic Hazard on US-101 Southbound north of S Novato Blvd (Novato). 2nd lane from the left blocked. Expect delays.

Moderate Accident

Marin 16 hours, 42 minutes ago

CHP : Traffic Hazard on US-101 Southbound exiting at S Novato Blvd (Novato). Lane blocked. Expect delays.

Moderate Accident

Marin 19 hours, 12 minutes ago

CHP : Traffic Hazard on US-101 Southbound south of Blossom Hill Rd (San Jose). Lane affected. Expect delays.

Moderate Accident

Santa Clara 20 hours, 12 minutes ago

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

Moderate Accident

San Mateo 21 hours, 27 minutes ago

CHP : Vehicle fire on US-101 Southbound south of Metcalf Rd (San Jose). Right shoulder affected. Expect delays.

Moderate Accident

Santa Clara 22 hours, 12 minutes ago

CHP : Traffic Hazard on US-101 Southbound north of E Dunne Ave (Morgan Hill). Center Divider affected. Expect delays.

Santa Clara 1 day, 1 hour ago

Caltrans : Roadwork on US-101 Southbound between CA-85 S (san Jose) (San Jose) and Metcalf Rd (San Jose). Various lanes closed until 5 AM. From 7:00 PM Sunday, October 25, 2026 to 5:00 AM Monday, October 26, 2026.

Santa Clara 1 day, 2 hours ago

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

Moderate Accident

San Mateo 1 day, 6 hours ago

CHP : Traffic Collision with Injuries on US-101 Southbound north of E Capitol Expy (San Jose). Lane affected. Expect delays.

Moderate Accident

Santa Clara 1 day, 7 hours ago

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

San Mateo 1 day, 10 hours ago

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

Moderate Accident

San Mateo 1 day, 10 hours ago

CHP : Traffic Hazard on US-101 Southbound north of E Blithedale Ave (Mill Valley). Center Divider affected. Expect delays.

Marin 1 day, 11 hours ago

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

Moderate Accident

San Mateo 1 day, 12 hours ago

CHP : Traffic Hazard on US-101 Southbound north of Mckee Rd (San Jose). Lane affected. Expect delays.

Moderate Accident

Santa Clara 1 day, 12 hours ago

CHP : Traffic Hazard on US-101 Southbound at Silver Ave (San Francisco). Off Ramp affected. Expect delays.

San Francisco 1 day, 13 hours ago

CHP : Traffic Hazard on US-101 Southbound south of E Blithedale Ave (Mill Valley). Center Divider affected. Expect delays.

Marin 1 day, 13 hours ago

CHP : Traffic Hazard on US-101 Southbound south of Lytton Springs Rd (Unincorporated). Right shoulder affected. Expect delays.

Moderate Accident

Sonoma 1 day, 13 hours ago

CHP : Traffic Hazard on US-101 Southbound north of CA-237 W (Sunnyvale). Right shoulder affected. Expect delays.

Moderate Accident

Santa Clara 1 day, 14 hours ago

CHP : Traffic Hazard on US-101 Southbound at Cochrane Rd (Morgan Hill). Lanes affected. Expect delays.

Moderate Accident

Santa Clara 1 day, 16 hours ago

CHP : Traffic Hazard on US-101 Southbound north of Guadalupe Pky (San Jose). Right lane affected. Expect delays.

Moderate Accident

Santa Clara 1 day, 17 hours ago

CHP : Traffic Hazard on US-101 Southbound north of Lucky Dr (Corte Madera). Center lanes blocked. Expect delays.

Moderate Accident

Marin 1 day, 17 hours ago

CHP : Residual delays on US-101 Southbound at E San Martin Ave (San Martin). Center Divider affected. Expect delays.

Santa Clara 1 day, 17 hours ago

CHP : Traffic Hazard on US-101 Southbound south of N San Pedro Rd (San Rafael). Lane blocked. Expect delays.

Moderate Accident

Marin 1 day, 19 hours ago

CHP : Severe traffic alert and Traffic Collision with Injuries and Overturned vehicle on US-101 Southbound north of Blossom Hill Rd (San Jose). Right and center lanes blocked. Expect delays.

Santa Clara 1 day, 21 hours ago

CHP : Traffic Collision with Injuries on US-101 Southbound at N Lawrence Expy (Sunnyvale). Right shoulder affected. Expect delays.

Moderate Accident

Santa Clara 1 day, 23 hours ago

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

San Mateo 1 day, 23 hours ago

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

Moderate Accident

San Mateo 2 days, 3 hours ago

CHP : Traffic Collision with Injuries on US-101 Southbound north of Metcalf Rd (San Jose). Lanes open. Expect delays.

Santa Clara 2 days, 3 hours ago

CHP : Traffic Collision on US-101 Southbound at Wilfred Ave (Rohnert Park). Lane affected. Expect delays.

Moderate Accident

Sonoma 2 days, 6 hours ago

CHP : Traffic Hazard on US-101 Southbound north of Cesar Chavez St (San Francisco). Right shoulder affected. Expect delays.

Moderate Accident

San Francisco 2 days, 6 hours ago

Caltrans : Roadwork on US-101 Southbound exiting at E Hillsdale Blvd (San Mateo). Off Ramp closed until 11 AM. From 7:00 PM Saturday, October 24, 2026 to 11:00 AM Sunday, October 25, 2026.

San Mateo 2 days, 7 hours ago

CHP : Traffic Collision on US-101 Southbound north of San Marin Dr (Novato). Lane affected. Expect delays.

Moderate Accident

Marin 2 days, 8 hours ago

CHP : Traffic Hazard on US-101 Southbound south of Woodside Rd (Redwood City). Right lane blocked. Expect delays.

Moderate Accident

San Mateo 2 days, 11 hours ago

CHP : Disabled vehicle on US-101 Southbound north of Ignacio Blvd (Novato). Lane affected. Expect delays.

Moderate Accident

Marin 2 days, 11 hours ago

CHP : Disabled vehicle on US-101 Southbound north of N Shoreline Blvd (Mountain View). Lane blocked. Expect delays.

Moderate Accident

Santa Clara 2 days, 12 hours ago