CA · Highway

CA-84 W Accidents & Crashes

CA-84 W has recorded 200 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 Alameda and San Mateo.

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: 125 accident, 75 construction.

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-84 W. Click a marker to view details.

Crash Records

CA-84 W Incidents 200 results

125 accident 75 construction

CHP : Traffic Hazard on CA-84 Westbound east of Dumbarton Bridge - Toll Plaza (Fremont). Left lane blocked. Expect delays.

Alameda 1 hour, 5 minutes ago

CHP : Traffic Collision on CA-84 Westbound west of Vallecitos Ln (Sunol). Lane blocked. Expect delays.

Moderate Accident

Alameda 2 days ago

CHP : Traffic Collision with Injuries on CA-84 Westbound north of E Stanley Blvd (Livermore). Right shoulder affected. Expect delays.

Moderate Accident

Alameda 3 days, 9 hours ago

CHP : Traffic Hazard on CA-84 Westbound east of Dumbarton Bridge - Toll Plaza (Fremont). Right lane blocked. Expect delays.

Alameda 3 days, 21 hours ago

CHP : Traffic Collision on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). Center lane blocked. Expect delays.

Alameda 4 days, 7 hours ago

CHP : Residual delays on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). All lanes open. Expect delays.

Alameda 4 days, 7 hours ago

CHP : Disabled vehicle on CA-84 Westbound at Dumbarton Bridge - Toll Plaza (Fremont). 3rd lane from the left blocked. Expect delays.

Alameda 6 days, 19 hours ago

Caltrans : Roadwork on CA-84 Eastbound and Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 7:00 AM Tuesday, October 20, 2026 to 5:00 PM Tuesday, October 20, 2026.

San Mateo 6 days, 21 hours ago

CHP : Disabled vehicle on CA-84 Westbound at Dumbarton Bridge - Midspan (Fremont). Left lane blocked. Expect delays.

Alameda 1 week ago

CHP : Disabled vehicle on CA-84 Westbound west of Dumbarton Bridge - Midspan (Fremont). Left lane blocked. Expect delays.

Alameda 1 week ago

CHP : Brush fire on CA-84 Westbound east of Thornton Ave (Newark). All lanes open. Expect delays.

Alameda 1 week ago

Caltrans : Roadwork on CA-84 Eastbound and Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 7:00 AM Monday, October 19, 2026 to 5:00 PM Monday, October 19, 2026.

San Mateo 1 week ago

CHP : Traffic Collision on CA-84 Eastbound and Westbound west of I-280 S (Woodside). All lanes blocked. Avoid the area.

San Mateo 1 week, 2 days ago

CHP : Traffic Collision with Injuries on CA-84 Westbound east of University Ave (Menlo Park). All lanes open. Expect delays.

San Mateo 1 week, 3 days ago

CHP : Traffic Collision with Injuries on CA-84 Westbound west of I-880 N (Fremont). Left lane open. Expect delays.

Alameda 1 week, 5 days ago

CHP : Disabled vehicle on CA-84 Westbound east of Thornton Ave (Newark). Lane affected. Expect delays.

Moderate Accident

Alameda 2 weeks, 2 days ago

CHP : Traffic Hazard on CA-84 Westbound at Dumbarton Bridge - Midspan (Fremont). Lanes affected. Expect delays.

Alameda 2 weeks, 4 days ago

CHP : Traffic Hazard on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). Lane affected. Expect delays.

Alameda 2 weeks, 5 days ago

CHP : Residual delays on CA-84 Westbound west of Dumbarton Bridge - Causeway (Fremont). Right shoulder affected. Expect delays.

Alameda 2 weeks, 6 days ago

CHP : Traffic Collision on CA-84 Westbound west of Little Valley Rd (Sunol). Lane affected. Expect delays.

Moderate Accident

Alameda 3 weeks, 1 day ago

Caltrans : Roadwork on CA-84 Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 7:00 AM Friday, October 02, 2026 to 4:00 PM Friday, October 02, 2026.

San Mateo 3 weeks, 3 days ago

Caltrans : Roadwork on CA-84 Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 7:00 AM Thursday, October 01, 2026 to 4:00 PM Thursday, October 01, 2026.

San Mateo 3 weeks, 4 days ago

CHP : Fog on CA-84 Eastbound and Westbound between Dumbarton Bridge - Toll Plaza (Fremont) and University Ave (Menlo Park). Lanes affected. Traffic advisory in effect.

Alameda 3 weeks, 5 days ago

CHP : Residual delays on CA-84 Westbound west of Dumbarton Bridge - Midspan (Fremont). Right shoulder affected. Expect delays.

Alameda 3 weeks, 5 days ago

Caltrans : Roadwork on CA-84 Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 7:00 AM Wednesday, September 30, 2026 to 4:00 PM Wednesday, September 30, 2026.

San Mateo 3 weeks, 5 days ago

Caltrans : Roadwork on CA-84 Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 8:00 AM Tuesday, September 29, 2026 to 8:00 PM Tuesday, September 29, 2026.

San Mateo 3 weeks, 6 days ago

Caltrans : Roadwork on CA-84 Eastbound and Westbound east of Pescadero Creek Rd (Pescadero). One way traffic control is in effect. Expect delays. From 10:30 AM Tuesday, September 29, 2026 to 6:00 PM Tuesday, September 29, 2026.

San Mateo 3 weeks, 6 days ago

Caltrans : Roadwork on CA-84 Eastbound and Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 7:00 AM Monday, September 28, 2026 to 4:00 PM Monday, September 28, 2026.

San Mateo 4 weeks, 1 day ago

Caltrans : Roadwork on CA-84 Eastbound and Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 8:00 AM Monday, September 28, 2026 to 1:00 PM Monday, September 28, 2026.

San Mateo 4 weeks, 1 day ago

Caltrans : Roadwork on CA-84 Eastbound and Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 9:00 AM Monday, September 28, 2026 to 3:00 PM Monday, September 28, 2026.

San Mateo 4 weeks, 1 day ago

CHP : Disabled vehicle on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). 2nd lane from the left blocked. Expect delays.

San Mateo 1 month ago

Caltrans : Roadwork on CA-84 Westbound at Mission Blvd (Fremont). Lane closed. One way traffic control in effect. From 8:00 PM Friday, September 25, 2026 to 5:00 AM Saturday, September 26, 2026.

Alameda 1 month ago

Caltrans : Roadwork on CA-84 Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 6:00 AM Friday, September 25, 2026 to 6:00 PM Friday, September 25, 2026.

San Mateo 1 month ago

CHP : High winds on CA-84 Eastbound and Westbound between Dumbarton Bridge - Toll Plaza (Fremont) and University Ave (Menlo Park). Lanes affected. Traffic advisory in effect.

Alameda 1 month ago

CHP : Traffic Hazard on CA-84 Westbound at I-880 N (Fremont). Lane affected. Expect delays.

Moderate Accident

Alameda 1 month ago

CHP : Traffic Hazard on CA-84 Westbound ramp to I-280 S (Woodside). Lane blocked. Expect delays.

San Mateo 1 month ago

CHP : Disabled vehicle on CA-84 Westbound east of University Ave (Menlo Park). Left lane blocked. Expect delays.

Moderate Accident

San Mateo 1 month ago

Caltrans : Roadwork on CA-84 Eastbound and Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 6:00 AM Wednesday, September 23, 2026 to 6:00 PM Wednesday, September 23, 2026.

San Mateo 1 month ago

Caltrans : Roadwork on CA-84 Eastbound and Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 6:00 AM Tuesday, September 22, 2026 to 6:00 PM Tuesday, September 22, 2026.

San Mateo 1 month ago

CHP : Residual delays on CA-84 Westbound west of Paseo Padre Pky (Fremont). All lanes open. Expect delays.

Alameda 1 month ago

Caltrans : Roadwork on CA-84 Eastbound and Westbound at CA-35 (Woodside). Lane closed. One way traffic control in effect. From 6:00 AM Monday, September 21, 2026 to 6:00 PM Monday, September 21, 2026.

San Mateo 1 month ago

CHP : Traffic Collision on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). Right shoulder affected. Expect delays.

San Mateo 1 month ago

CHP : Disabled vehicle on CA-84 Westbound west of Ardenwood Blvd (Newark). 2nd lane from the left affected. Expect delays.

Moderate Accident

Alameda 1 month ago

CHP : Residual delays on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). All lanes open. Expect delays.

Alameda 1 month, 1 week ago

CHP : Severe traffic alert and Traffic Collision with Injuries on CA-84 Westbound at Dumbarton Bridge - Toll Plaza (Fremont). Right and center lanes blocked. Expect delays.

Alameda 1 month, 1 week ago

CHP : Traffic Collision with Injuries on CA-84 Westbound entering at Ardenwood Blvd (Newark). On Ramp affected. Expect delays.

Alameda 1 month, 1 week ago

CHP : Severe traffic alert and Traffic Collision with Injuries on CA-84 Eastbound and Westbound west of Pescadero Creek Rd (Pescadero). One way traffic control is in effect. Expect delays.

San Mateo 1 month, 2 weeks ago

CHP : Traffic Hazard on CA-84 Westbound west of I-880 N (Fremont). Right lane affected. Expect delays.

Moderate Accident

Alameda 1 month, 2 weeks ago

CHP : Traffic Hazard on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). Left lanes blocked. Expect delays.

Alameda 1 month, 2 weeks ago

CHP : Residual delays on CA-84 Eastbound and Westbound between Kilkare Rd (Sunol) and Mission Blvd (Fremont). All lanes open. Expect delays.

Alameda 1 month, 2 weeks ago