CA · Highway

CA-1 S Accidents & Crashes

CA-1 S has recorded 47 traffic crashes in California since 2024, with no fatalities on record. In the last 24 hours, 3 new crashes 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 April 22, 2026.

Breakdown by type: 28 construction, 19 accident.

47

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

3

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 47 results

28 construction 19 accident

Caltrans : Roadwork on CA-1 Northbound and Southbound at Marshall-petaluma Rd (Marshall). Lane closed. One way traffic control in effect. From 9:00 AM Wednesday, April 22, 2026 to 3:00 PM Wednesday, April 22, 2026.

Marin 0 minutes ago Live

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, April 22, 2026 to 6:00 PM Wednesday, April 22, 2026.

San Mateo 0 minutes ago Live

Caltrans : Roadwork on CA-1 Northbound and Southbound at Capistrano Rd (El Granada). Lane closed. One way traffic control in effect. From 9:00 AM Wednesday, April 22, 2026 to 3:00 PM Wednesday, April 22, 2026.

San Mateo 0 minutes ago Live

Caltrans : Roadwork on CA-1 Southbound at Capistrano Rd (El Granada). Lane closed. One way traffic control in effect. From 9:00 AM Tuesday, April 21, 2026 to 3:00 PM Tuesday, April 21, 2026.

San Mateo 21 hours, 30 minutes ago

CHP : Traffic Collision on CA-1 Southbound north of CA-17 N (Santa Cruz). On Ramp affected. Expect delays.

Santa Cruz 1 day, 12 hours ago

CHP : Flooding on CA-1 Southbound north of Monterey Rd (Pacifica). Lanes affected. Expect delays.

San Mateo 1 day, 17 hours ago

CHP : Residual delays on CA-1 Southbound at Almonte Blvd (Unincorporated). All lanes open. Expect delays.

Marin 1 day, 18 hours ago

Caltrans : Roadwork on CA-1 Southbound at Capistrano Rd (El Granada). Lane closed. One way traffic control in effect. From 9:00 AM Monday, April 20, 2026 to 3:00 PM Monday, April 20, 2026.

San Mateo 1 day, 21 hours ago

Caltrans : Roadwork on CA-1 Southbound at Bay St (Unincorporated). Lane closed until 3 PM. From 9:00 AM Monday, April 20, 2026 to 3:00 PM Monday, April 20, 2026.

San Mateo 1 day, 21 hours ago

CHP : Traffic Collision with Injuries on CA-1 Southbound north of Sharp Park Rd (Pacifica). Lane affected. Expect delays.

Moderate Accident

San Mateo 1 day, 22 hours ago

Caltrans : Roadwork on CA-1 Southbound at Sir Francis Drake Blvd (Olema). Lane closed. One way traffic control in effect. From 9:00 AM Monday, April 20, 2026 to 3:00 PM Monday, April 20, 2026.

Marin 2 days ago

CHP : Traffic Hazard on CA-1 Southbound ramp to Skyline Blvd (Daly City). Left lane affected. Expect delays.

Moderate Accident

San Mateo 2 days, 4 hours ago

CHP : Traffic Collision with Injuries on CA-1 Southbound north of Stewarts Point Skaggs Springs Rd (Unincorporated). All lanes blocked. Avoid the area.

Sonoma 4 days, 16 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 Friday, April 17, 2026 to 6:00 PM Friday, April 17, 2026.

San Mateo 4 days, 18 hours ago

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

Santa Cruz 5 days, 4 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 Thursday, April 16, 2026 to 6:00 PM Thursday, April 16, 2026.

San Mateo 5 days, 20 hours ago

CHP : Traffic Hazard on CA-1 Southbound north of CA-17 N (Santa Cruz). 2nd lane from the left affected. Expect delays.

Moderate Accident

Santa Cruz 6 days, 4 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 Wednesday, April 15, 2026 to 6:00 PM Wednesday, April 15, 2026.

San Mateo 6 days, 20 hours ago

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

San Mateo 1 week ago

Caltrans : Roadwork on CA-1 Southbound at Higgins Canyon Rd (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Tuesday, April 14, 2026 to 6:00 AM Wednesday, April 15, 2026.

San Mateo 1 week 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, April 14, 2026 to 6:00 PM Tuesday, April 14, 2026.

San Mateo 1 week ago

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

San Mateo 1 week, 1 day ago

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

San Mateo 1 week, 1 day ago

CHP : Disabled tractor trailer and Downed wires on CA-1 Southbound at Garden Hwy (). Lanes blocked. Expect delays.

Marin 1 week, 1 day ago

Caltrans : Emergency construction on CA-1 Northbound and Southbound at Santa Cruz County Line (Unincorporated). One way traffic control is in effect. One way traffic control in effect. From 7:00 AM Monday, April 13, 2026 to 6:00 PM Monday, April 13, 2026.

San Mateo 1 week, 1 day ago

CHP : Residual delays on CA-1 Southbound north of Gravenstein Hwy (Valley Ford). All lanes open. Expect delays.

Sonoma 1 week, 3 days ago

CHP : Disabled vehicle on CA-1 Eastbound and Westbound north of Rocky Point Rd (Steep Ravine Trail) (). Lanes blocked. Expect delays.

Santa Cruz 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, April 10, 2026 to 6:00 PM Friday, April 10, 2026.

San Mateo 1 week, 4 days ago

CHP : Traffic Collision with Injuries and Overturned vehicle on CA-1 Southbound north of Valley Ford Rd (Valley Ford). Lane blocked. Expect delays.

Sonoma 1 week, 4 days ago

CHP : Residual delays on CA-1 Northbound and Southbound south of Gravenstein Hwy (Valley Ford). All lanes open. Expect delays.

Sonoma 1 week, 5 days ago

CHP : Traffic Collision with Injuries and Overturned vehicle on CA-1 Southbound north of Sir Francis Drake Blvd (Olema). One way traffic control is in effect. Expect delays.

Marin 1 week, 5 days ago

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

Moderate Accident

San Mateo 1 week, 5 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, April 09, 2026 to 6:00 PM Thursday, April 09, 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, April 08, 2026 to 6:00 AM Thursday, April 09, 2026.

San Mateo 1 week, 6 days ago

CHP : Traffic Hazard on CA-1 Southbound south of Skyline Blvd (Daly City). Lanes blocked. Expect delays.

San Mateo 1 week, 6 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 Wednesday, April 08, 2026 to 6:00 PM Wednesday, April 08, 2026.

San Mateo 1 week, 6 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, April 08, 2026 to 3:00 PM Wednesday, April 08, 2026.

Marin 1 week, 6 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 Tuesday, April 07, 2026 to 6:00 PM Tuesday, April 07, 2026.

San Mateo 2 weeks ago

Caltrans : Roadwork on CA-1 Southbound at Marshall-petaluma Rd (Marshall). Lane closed. One way traffic control in effect. From 9:00 AM Tuesday, April 07, 2026 to 3:00 PM Tuesday, April 07, 2026.

Marin 2 weeks ago

Caltrans : Roadwork on CA-1 Southbound at Higgins Canyon Rd (Half Moon Bay). Lane closed until 10 AM. From 6:00 PM Monday, April 06, 2026 to 10:00 AM Tuesday, April 07, 2026.

San Mateo 2 weeks, 1 day ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Monday, April 06, 2026 to 6:00 AM Tuesday, April 07, 2026.

San Mateo 2 weeks, 1 day ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Monday, April 06, 2026 to 6:00 AM Tuesday, April 07, 2026.

San Mateo 2 weeks, 1 day ago

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

Moderate Accident

Santa Cruz 2 weeks, 1 day 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, April 06, 2026 to 6:00 PM Monday, April 06, 2026.

San Mateo 2 weeks, 1 day ago

Caltrans : Roadwork on CA-1 Southbound at Point Reyes-petaluma Rd (Point Reyes Station). Lane closed. One way traffic control in effect. From 9:00 AM Monday, April 06, 2026 to 3:00 PM Monday, April 06, 2026.

Marin 2 weeks, 1 day ago

CHP : Traffic Collision on CA-1 Southbound north of Brotherhood Way (San Francisco). Left lanes blocked. Expect delays.

Moderate Accident

San Francisco 2 weeks, 2 days ago

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

Moderate Accident

Santa Cruz 2 weeks, 3 days ago