CA · Highway

CA-1 S Accidents & Crashes

CA-1 S has recorded 642 traffic crashes in California since 2024, with no fatalities on record. In the last 24 hours, 1 new crash were reported. The highest crash volumes are concentrated near San Mateo 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: 474 construction, 162 accident, 6 other.

642

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

1

Today

Reported since midnight

Today's Accidents Today's Fatalities

Crash locations on CA-1 S. Click a marker to view details.

Crash Records

CA-1 S Incidents 642 results

474 construction 162 accident 6 other

Caltrans : Long-term construction on CA-1 Southbound south of Gravenstein Hwy (Valley Ford). Left lane closed. Expect delays. From 5:30 AM Monday, September 28, 2026 to 5:00 PM Monday, November 09, 2026.

Sonoma 6 minutes ago Live

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.

San Mateo 21 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.

San Mateo 20 hours, 36 minutes ago

CHP : Residual delays on CA-1 Southbound at CA-17 N (Santa Cruz). Right shoulder affected. Expect delays.

Moderate Accident

Santa Cruz 1 day, 2 hours ago

CHP : Residual delays on CA-1 Northbound and Southbound south of Muir Woods Rd (Unincorporated). All lanes open. Expect delays.

Marin 1 day, 12 hours ago

CHP : Traffic Collision on CA-1 Southbound north of 1st St (Montara). Lane blocked. Expect delays.

San Mateo 2 days, 14 hours ago

CHP : Traffic Hazard on CA-1 Southbound north of CA-17 N (Santa Cruz). Left lane affected. Expect delays.

Moderate Accident

Santa Cruz 2 days, 19 hours ago

Caltrans : Roadwork on CA-1 Southbound between Fulton St (San Francisco) and Brotherhood Way (San Francisco). Lane closed until 5 AM. From 9:00 PM Friday, October 23, 2026 to 5:00 AM Saturday, October 24, 2026.

San Francisco 3 days, 4 hours ago

CHP : Disabled vehicle on CA-1 Southbound at CA-17 N (Santa Cruz). Lane affected. Expect delays.

Moderate Accident

Santa Cruz 3 days, 12 hours ago

CHP : Traffic Hazard on CA-1 Southbound north of Serramonte Blvd (Daly City). Lane affected. Expect delays.

Moderate Accident

San Mateo 3 days, 15 hours ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lanes closed until 6 AM. From 10:00 PM Thursday, October 22, 2026 to 6:00 AM Friday, October 23, 2026.

San Mateo 4 days, 7 hours ago

CHP : Disabled vehicle on CA-1 Southbound north of Geary Blvd (San Francisco). Left lane blocked. Expect delays.

Moderate Accident

San Francisco 4 days, 9 hours ago

CHP : Traffic Collision on CA-1 Southbound at Paloma Ave (Pacifica). Lane affected. Expect delays.

Moderate Accident

San Mateo 4 days, 11 hours 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 Wednesday, October 21, 2026 to 4:00 PM Wednesday, October 21, 2026.

San Mateo 5 days, 16 hours ago

CHP : Traffic Hazard on CA-1 Southbound north of Serramonte Blvd (Daly City). 3rd lane from the left blocked. Expect delays.

Moderate Accident

San Mateo 6 days, 14 hours ago

Caltrans : Emergency construction on CA-1 Northbound and Southbound at Santa Cruz County Line (Unincorporated). Lane closed. One way traffic control in effect. From 7:00 AM Tuesday, October 20, 2026 to 4:00 PM Tuesday, October 20, 2026.

San Mateo 6 days, 16 hours ago

Caltrans : Roadwork on CA-1 Northbound and Southbound at 1st St (Montara). Lane closed. One way traffic control in effect. From 9:00 AM Tuesday, October 20, 2026 to 3:00 PM Tuesday, October 20, 2026.

San Mateo 6 days, 17 hours ago

CHP : Disabled bus on CA-1 Southbound south of CA-17 N (Santa Cruz). Right lane affected. Expect delays.

Moderate Accident

Santa Cruz 1 week ago

Caltrans : Emergency construction on CA-1 Northbound and Southbound at Santa Cruz County Line (Unincorporated). Lane closed. One way traffic control in effect. From 7:00 AM Monday, October 19, 2026 to 4:00 PM Monday, October 19, 2026.

San Mateo 1 week ago

Caltrans : Roadwork on CA-1 Northbound and Southbound at 1st St (Montara). Lane closed. One way traffic control in effect. From 9:00 AM Monday, October 19, 2026 to 3:00 PM Monday, October 19, 2026.

San Mateo 1 week ago

Caltrans : Roadwork on CA-1 Northbound and Southbound at Sir Francis Drake Blvd (Olema). Lane closed. One way traffic control in effect. From 9:00 AM Monday, October 19, 2026 to 3:00 PM Monday, October 19, 2026.

Marin 1 week ago

CHP : Traffic Hazard on CA-1 Southbound north of CA-17 N (Santa Cruz). Right shoulder affected. Expect delays.

Moderate Accident

Santa Cruz 1 week, 1 day ago

CHP : Traffic Hazard on CA-1 Southbound south of CA-17 N (Santa Cruz). Lanes affected. Expect delays.

Santa Cruz 1 week, 2 days ago

CHP : Disabled truck on CA-1 Southbound north of Old Devil's Slide Hwy (Pacifica). Lane blocked. Expect delays.

San Mateo 1 week, 2 days ago

CHP : Traffic Hazard on CA-1 Southbound north of Serramonte Blvd (Daly City). Left lane affected. Expect delays.

Moderate Accident

San Mateo 1 week, 3 days 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 Friday, October 16, 2026 to 2:00 PM Friday, October 16, 2026.

San Mateo 1 week, 3 days ago

CHP : Tractor trailer fire on CA-1 Southbound south of CA-17 N (Santa Cruz). Right and center lanes blocked. Expect delays.

Santa Cruz 1 week, 3 days ago

CHP : Police department activity on CA-1 Northbound and Southbound south of CA-17 S (Santa Cruz). All lanes blocked. Expect delays.

Santa Cruz 1 week, 4 days ago

Caltrans : Roadwork on CA-1 Southbound at Higgins Canyon Rd (Half Moon Bay). Lane closed until 6 AM. From 7:00 PM Thursday, October 15, 2026 to 6:00 AM Friday, October 16, 2026.

San Mateo 1 week, 4 days ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Thursday, October 15, 2026 to 6:00 AM Friday, October 16, 2026.

San Mateo 1 week, 4 days ago

Caltrans : Roadwork on CA-1 Southbound at Capistrano Rd (El Granada). Lane closed until 6 AM. From 8:00 PM Thursday, October 15, 2026 to 6:00 AM Friday, October 16, 2026.

San Mateo 1 week, 4 days ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Thursday, October 15, 2026 to 6:00 AM Friday, October 16, 2026.

San Mateo 1 week, 4 days ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Thursday, October 15, 2026 to 6:00 AM Friday, October 16, 2026.

San Mateo 1 week, 4 days ago

Caltrans : Roadwork on CA-1 Southbound at Capistrano Rd (El Granada). Lane closed until 6 AM. From 10:00 PM Thursday, October 15, 2026 to 6:00 AM Friday, October 16, 2026.

San Mateo 1 week, 4 days ago

Caltrans : Long-term construction on CA-1 Southbound at Sir Francis Drake Blvd (Olema). Lane closed. One way traffic control in effect. From 5:00 PM Friday, September 11, 2026 to 5:00 PM Friday, October 16, 2026.

Marin 1 week, 4 days 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 Thursday, October 15, 2026 to 4:00 PM Thursday, October 15, 2026.

San Mateo 1 week, 4 days ago

CHP : Traffic Hazard on CA-1 Eastbound and Westbound north of Rocky Point Rd (Steep Ravine Trail) (). Lane affected. Expect delays.

Santa Cruz 1 week, 4 days ago

Caltrans : Roadwork on CA-1 Southbound at Capistrano Rd (El Granada). Lane closed until 6 AM. From 10:00 PM Wednesday, October 14, 2026 to 6:00 AM Thursday, October 15, 2026.

San Mateo 1 week, 5 days ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Wednesday, October 14, 2026 to 6:00 AM Thursday, October 15, 2026.

San Mateo 1 week, 5 days ago

Caltrans : Roadwork on CA-1 Southbound at Higgins Canyon Rd (Half Moon Bay). Lane closed until 6 AM. From 7:00 PM Wednesday, October 14, 2026 to 6:00 AM Thursday, October 15, 2026.

San Mateo 1 week, 5 days ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Wednesday, October 14, 2026 to 6:00 AM Thursday, October 15, 2026.

San Mateo 1 week, 5 days ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Wednesday, October 14, 2026 to 6:00 AM Thursday, October 15, 2026.

San Mateo 1 week, 5 days ago

Caltrans : Roadwork on CA-1 Northbound and Southbound at Valley Ford Freestone Rd (Valley Ford). Lane closed. One way traffic control in effect. From 8:00 AM Wednesday, October 14, 2026 to 4:30 PM Wednesday, October 14, 2026.

Sonoma 1 week, 5 days ago

Caltrans : Emergency construction on CA-1 Northbound and Southbound at Santa Cruz County Line (Unincorporated). Lane closed. One way traffic control in effect. From 7:00 AM Wednesday, October 14, 2026 to 4:00 PM Wednesday, October 14, 2026.

San Mateo 1 week, 5 days ago

Caltrans : Roadwork on CA-1 Southbound at Marshall-petaluma Rd (Marshall). Lane closed. One way traffic control in effect. From 9:00 AM Wednesday, October 14, 2026 to 3:00 PM Wednesday, October 14, 2026.

Marin 1 week, 5 days ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Tuesday, October 13, 2026 to 6:00 AM Wednesday, October 14, 2026.

San Mateo 1 week, 6 days ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Tuesday, October 13, 2026 to 6:00 AM Wednesday, October 14, 2026.

San Mateo 1 week, 6 days ago

Caltrans : Roadwork on CA-1 Southbound at Capistrano Rd (El Granada). Lane closed until 6 AM. From 10:00 PM Tuesday, October 13, 2026 to 6:00 AM Wednesday, October 14, 2026.

San Mateo 1 week, 6 days ago

Caltrans : Roadwork on CA-1 Southbound at Higgins Canyon Rd (Half Moon Bay). Lane closed until 6 AM. From 7:00 PM Tuesday, October 13, 2026 to 6:00 AM Wednesday, October 14, 2026.

San Mateo 1 week, 6 days ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Tuesday, October 13, 2026 to 6:00 AM Wednesday, October 14, 2026.

San Mateo 1 week, 6 days ago