CA · Highway

CA-1 S Accidents & Crashes

CA-1 S has recorded 201 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 Santa Cruz.

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 June 10, 2026.

Breakdown by type: 135 construction, 65 accident.

200

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 200 results

135 construction 65 accident

Caltrans : Roadwork on CA-1 Southbound at CA-84 (San Gregorio). Lane closed. One way traffic control in effect. From 7:00 AM Wednesday, June 10, 2026 to 5:00 PM Wednesday, June 10, 2026.

San Mateo 1 minute ago Live

Caltrans : Roadwork on CA-1 Southbound at CA-84 (San Gregorio). Lane closed. One way traffic control in effect. From 7:00 AM Tuesday, June 09, 2026 to 5:00 PM Tuesday, June 09, 2026.

San Mateo 19 hours, 31 minutes ago

Caltrans : Roadwork on CA-1 Southbound at Valley Ford Rd (Valley Ford). Lane closed. One way traffic control in effect. From 9:00 AM Tuesday, June 09, 2026 to 3:00 PM Tuesday, June 09, 2026.

Marin 20 hours, 31 minutes ago

Caltrans : Roadwork on CA-1 Southbound at Valley Ford Rd (Valley Ford). Lane closed. One way traffic control in effect. From 9:00 AM Monday, June 08, 2026 to 3:00 PM Monday, June 08, 2026.

Marin 1 day, 20 hours ago

Caltrans : Roadwork on CA-1 Southbound at CA-84 (San Gregorio). Lane closed. One way traffic control in effect. From 7:00 AM Monday, June 08, 2026 to 5:00 PM Monday, June 08, 2026.

San Mateo 1 day, 21 hours ago

CHP : Traffic Collision on CA-1 Southbound at US-101 N (Sausalito). Lane affected. Expect delays.

Moderate Accident

Marin 3 days, 1 hour ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Friday, June 05, 2026 to 6:00 AM Saturday, June 06, 2026.

San Mateo 4 days, 5 hours ago

Caltrans : Roadwork on CA-1 Southbound at Marshall-petaluma Rd (Marshall). Lane closed until 3 PM. From 9:00 AM Friday, June 05, 2026 to 3:00 PM Friday, June 05, 2026.

Marin 4 days, 20 hours ago

Caltrans : Roadwork on CA-1 Southbound at Bodega Hwy (Bodega). Lane closed. One way traffic control in effect. From 9:00 AM Friday, June 05, 2026 to 3:00 PM Friday, June 05, 2026.

Sonoma 4 days, 20 hours ago

Caltrans : Roadwork on CA-1 Southbound at Valley Ford Freestone Rd (Valley Ford). Lane closed. One way traffic control in effect. From 9:00 AM Friday, June 05, 2026 to 3:00 PM Friday, June 05, 2026.

Sonoma 4 days, 20 hours ago

Caltrans : Roadwork on CA-1 Southbound at CA-84 (San Gregorio). Lane closed. One way traffic control in effect. From 7:00 AM Friday, June 05, 2026 to 5:00 PM Friday, June 05, 2026.

San Mateo 4 days, 21 hours ago

Caltrans : Roadwork on CA-1 Southbound at Gravenstein Hwy (Valley Ford). Lane closed. One way traffic control in effect. From 9:00 AM Friday, June 05, 2026 to 12:00 PM Friday, June 05, 2026.

Sonoma 4 days, 23 hours ago

Caltrans : Roadwork on CA-1 Southbound at Higgins Canyon Rd (Half Moon Bay). Lane closed until 8 AM. From 6:00 PM Thursday, June 04, 2026 to 8:00 AM Friday, June 05, 2026.

San Mateo 5 days, 5 hours ago

Caltrans : Roadwork on CA-1 Southbound at CA-92 E (Half Moon Bay). Lane closed until 6 AM. From 10:00 PM Thursday, June 04, 2026 to 6:00 AM Friday, June 05, 2026.

San Mateo 5 days, 5 hours ago

Caltrans : Roadwork on CA-1 Southbound at Sir Francis Drake Blvd (Olema). Lane closed. One way traffic control in effect. From 8:00 AM Thursday, June 04, 2026 to 5:00 PM Thursday, June 04, 2026.

Marin 5 days, 19 hours ago

Caltrans : Roadwork on CA-1 Southbound at Bodega Hwy (Bodega). Lane closed. One way traffic control in effect. From 9:00 AM Thursday, June 04, 2026 to 3:00 PM Thursday, June 04, 2026.

Sonoma 5 days, 20 hours ago

Caltrans : Roadwork on CA-1 Southbound at CA-84 (San Gregorio). Lane closed. One way traffic control in effect. From 7:00 AM Thursday, June 04, 2026 to 5:00 PM Thursday, June 04, 2026.

San Mateo 5 days, 21 hours ago

Caltrans : Roadwork on CA-1 Southbound at Higgins Canyon Rd (Half Moon Bay). Lane closed until 8 AM. From 6:00 PM Wednesday, June 03, 2026 to 8:00 AM Thursday, June 04, 2026.

San Mateo 6 days, 5 hours ago

CHP : Disabled vehicle on CA-1 Southbound south of CA-17 N (Santa Cruz). Center lane blocked. Expect delays.

Moderate Accident

Santa Cruz 6 days, 19 hours ago

Caltrans : Roadwork on CA-1 Northbound and Southbound at Sir Francis Drake Blvd (Olema). Lane closed. One way traffic control in effect. From 8:00 AM Wednesday, June 03, 2026 to 5:00 PM Wednesday, June 03, 2026.

Marin 6 days, 20 hours ago

Caltrans : Roadwork on CA-1 Northbound and Southbound at CA-84 (San Gregorio). Lane closed. One way traffic control in effect. From 7:00 AM Wednesday, June 03, 2026 to 5:00 PM Wednesday, June 03, 2026.

San Mateo 6 days, 21 hours ago

Caltrans : Roadwork on CA-1 Southbound at Bodega Hwy (Bodega). Lane closed. One way traffic control in effect. From 9:00 AM Wednesday, June 03, 2026 to 12:00 PM Wednesday, June 03, 2026.

Sonoma 6 days, 23 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, June 02, 2026 to 6:00 AM Wednesday, June 03, 2026.

San Mateo 1 week ago

CHP : Disabled vehicle on CA-1 Southbound north of Valley Ford Rd (Valley Ford). Lanes blocked. Expect delays.

Marin 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 8:00 AM Tuesday, June 02, 2026 to 5:00 PM Tuesday, June 02, 2026.

Marin 1 week ago

Caltrans : Roadwork on CA-1 Northbound and Southbound at Bodega Hwy (Bodega). Lane closed. One way traffic control in effect. From 9:00 AM Tuesday, June 02, 2026 to 3:00 PM Tuesday, June 02, 2026.

Sonoma 1 week ago

Caltrans : Roadwork on CA-1 Northbound and Southbound at CA-84 (San Gregorio). Lane closed. One way traffic control in effect. From 7:00 AM Tuesday, June 02, 2026 to 5:00 PM Tuesday, June 02, 2026.

San Mateo 1 week ago

Caltrans : Roadwork on CA-1 Southbound at Sir Francis Drake Blvd (Olema). Lane closed. One way traffic control in effect. From 8:00 AM Monday, June 01, 2026 to 5:00 PM Monday, June 01, 2026.

Marin 1 week, 1 day ago

Caltrans : Roadwork on CA-1 Southbound at CA-84 (San Gregorio). Lane closed. One way traffic control in effect. From 7:00 AM Monday, June 01, 2026 to 5:00 PM Monday, June 01, 2026.

San Mateo 1 week, 1 day ago

Caltrans : Roadwork on CA-1 Southbound at Valley Ford Freestone Rd (Valley Ford). Lane closed. One way traffic control in effect. From 9:00 AM Monday, June 01, 2026 to 12:00 PM Monday, June 01, 2026.

Sonoma 1 week, 1 day ago

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

Moderate Accident

Santa Cruz 1 week, 2 days ago

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

Moderate Accident

Santa Cruz 1 week, 2 days ago

CHP : Traffic Hazard on CA-1 Southbound west of Serramonte Blvd (Daly City). 2nd lane from the left blocked. Expect delays.

Moderate Accident

San Mateo 1 week, 3 days ago

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

Moderate Accident

Santa Cruz 1 week, 3 days ago

CHP : Traffic Hazard on CA-1 Southbound south of Brotherhood Way (San Francisco). Left lane blocked. Expect delays.

Moderate Accident

San Francisco 1 week, 4 days ago

Caltrans : Roadwork on CA-1 Southbound at Higgins Canyon Rd (Half Moon Bay). Lane closed until 8 AM. From 6:00 PM Friday, May 29, 2026 to 8:00 AM Saturday, May 30, 2026.

San Mateo 1 week, 4 days ago

CHP : Traffic Collision on CA-1 Southbound north of CA-84 (San Gregorio). Lane affected. Expect delays.

San Mateo 1 week, 4 days ago

Caltrans : Roadwork on CA-1 Northbound and Southbound at CA-84 (San Gregorio). Lane closed. One way traffic control in effect. From 7:00 AM Friday, May 29, 2026 to 5:00 PM Friday, May 29, 2026.

San Mateo 1 week, 4 days ago

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 Friday, May 29, 2026 to 3:00 PM Friday, May 29, 2026.

Marin 1 week, 4 days ago

CHP : Landslide on CA-1 Southbound south of Muir Woods Rd (Unincorporated). Lane affected. Expect delays.

Marin 1 week, 5 days ago

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

Moderate Accident

Santa Cruz 1 week, 6 days ago

Caltrans : Roadwork on CA-1 Southbound at Marshall-petaluma Rd (Marshall). Lane closed until 3 PM. From 9:00 AM Wednesday, May 27, 2026 to 3:00 PM Wednesday, May 27, 2026.

Marin 1 week, 6 days ago

Caltrans : Roadwork on CA-1 Northbound and Southbound at CA-84 (San Gregorio). Lane closed. One way traffic control in effect. From 7:00 AM Wednesday, May 27, 2026 to 5:00 PM Wednesday, May 27, 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 10:00 PM Tuesday, May 26, 2026 to 6:00 AM Wednesday, May 27, 2026.

San Mateo 2 weeks ago

CHP : Traffic Hazard on CA-1 Southbound at Mendocino County Line (Unincorporated). Lane blocked. Expect delays.

Sonoma 2 weeks ago

Caltrans : Roadwork on CA-1 Northbound and Southbound at Bonny Doon Rd (Unincorporated). Lane closed. One way traffic control in effect. From 9:00 AM Tuesday, May 26, 2026 to 3:00 PM Tuesday, May 26, 2026.

San Mateo 2 weeks ago

Caltrans : Roadwork on CA-1 Northbound and Southbound between Sloat Blvd (San Francisco) and Brotherhood Way (San Francisco). All lanes closed. Avoid the area. From 7:00 AM Friday, May 22, 2026 to 10:00 AM Monday, May 25, 2026.

San Francisco 2 weeks, 2 days ago

CHP : Traffic Hazard on CA-1 Southbound north of Geary Blvd (San Francisco). Lane affected. Expect delays.

Moderate Accident

San Francisco 2 weeks, 2 days ago

Caltrans : Roadwork on CA-1 Southbound between Sloat Blvd (San Francisco) and Brotherhood Way (San Francisco). Lanes closed until 7 AM. From 7:00 PM Sunday, May 24, 2026 to 7:00 AM Monday, May 25, 2026.

San Francisco 2 weeks, 2 days ago

Caltrans : Roadwork on CA-1 Southbound between Sloat Blvd (San Francisco) and Brotherhood Way (San Francisco). Lanes closed until 7 AM. From 7:00 PM Saturday, May 23, 2026 to 7:00 AM Sunday, May 24, 2026.

San Francisco 2 weeks, 3 days ago