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CA-84 W Accidents & Crashes

CA-84 W has recorded 110 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.

Breakdown by type: 59 accident, 51 construction.

110
Total Crashes
All time records
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

59 accident 51 construction
CHP : Disabled vehicle on CA-84 Westbound at Dumbarton Bridge - Midspan (Fremont). Left lane blocked. Expect delays.
High Accident
Alameda 5 hours, 45 minutes ago
CHP : Disabled vehicle on CA-84 Westbound east of Dumbarton Bridge - Toll Plaza (Fremont). Right shoulder affected. Expect delays.
High Accident
San Mateo 2 days, 21 hours ago
CHP : Disabled vehicle on CA-84 Westbound at Dumbarton Bridge - Midspan (Fremont). Right lane affected. Expect delays.
High Accident
Alameda 3 days, 12 hours 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.
High Accident
Alameda 4 days, 6 hours ago
Caltrans : Roadwork on CA-84 Westbound at Paseo Padre Pky (Fremont). Lane closed until 7 AM. From 5:00 AM Friday, July 17, 2026 to 7:00 AM Friday, July 17, 2026.
Construction
Alameda 1 week, 4 days ago
CHP : Traffic Hazard on CA-84 Westbound at Dumbarton Bridge - Midspan (Fremont). Right lane blocked. Expect delays.
High Accident
Alameda 1 week, 5 days ago
CHP : Traffic Hazard on CA-84 Westbound west of Dumbarton Bridge - Midspan (Fremont). Lane affected. Expect delays.
High Accident
Alameda 1 week, 6 days ago
CHP : Traffic Hazard on CA-84 Westbound east of Dumbarton Bridge - Midspan (Fremont). Lane affected. Expect delays.
High Accident
Alameda 2 weeks ago
CHP : Traffic Hazard on CA-84 Westbound at Dumbarton Bridge - Toll Plaza (Fremont). Center Divider affected. Expect delays.
Moderate Accident
San Mateo 3 weeks, 1 day ago
CHP : Traffic Hazard on CA-84 Westbound east of Dumbarton Bridge - Toll Plaza (Fremont). Right lane blocked. Expect delays.
High Accident
Alameda 3 weeks, 2 days ago
CHP : Traffic Collision on CA-84 Westbound west of US-101 S (Redwood City). Right shoulder affected. Expect delays.
Moderate Accident
San Mateo 3 weeks, 4 days ago
CHP : Residual delays on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). All lanes open. Expect delays.
Accident
Alameda 3 weeks, 6 days ago
CHP : Fire on CA-84 Westbound east of University Ave (Menlo Park). Lane affected. Expect delays.
Moderate Accident
San Mateo 4 weeks, 1 day ago
CHP : Disabled vehicle on CA-84 Westbound east of Ardenwood Blvd (Newark). Lane affected. Expect delays.
Moderate Accident
Alameda 1 month ago
CHP : Severe traffic alert and Traffic Collision on CA-84 Eastbound and Westbound between I-680 S (Sunol) and Pleasanton Sunol Rd (Scotts Corner). All lanes blocked. Avoid the area.
Accident
Alameda 1 month ago
Caltrans : Roadwork on CA-84 Eastbound and Westbound between Pleasanton Sunol Rd (Scotts Corner) and Kilkare Rd (Sunol). All lanes closed. Avoid the area. From 8:00 PM Wednesday, June 24, 2026 to 5:00 AM Thursday, June 25, 2026.
Construction
Alameda 1 month ago
CHP : Traffic Hazard on CA-84 Westbound east of I-880 N (Fremont). Lanes affected. Expect delays.
Moderate Accident
Alameda 1 month ago
Caltrans : Roadwork on CA-84 Westbound between I-280 N (Woodside) and I-280 S (Woodside). Lane closed until 3 PM. From 9:00 AM Wednesday, June 24, 2026 to 3:00 PM Wednesday, June 24, 2026.
Construction
San Mateo 1 month ago
Caltrans : Roadwork on CA-84 Westbound at Alameda De Las Pulgas (Redwood City). Lane closed until 3 PM. From 9:00 AM Tuesday, June 23, 2026 to 3:00 PM Tuesday, June 23, 2026.
Construction
San Mateo 1 month ago
Caltrans : Roadwork on CA-84 Westbound at Alameda De Las Pulgas (Redwood City). Lane closed until 3 PM. From 9:00 AM Monday, June 22, 2026 to 3:00 PM Monday, June 22, 2026.
Construction
San Mateo 1 month ago
CHP : Traffic Hazard on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). Lane affected. Expect delays.
High Accident
San Mateo 1 month ago
CHP : Traffic Hazard on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). Lane affected. Expect delays.
High Accident
San Mateo 1 month ago
CHP : Traffic Hazard on CA-84 Westbound east of Dumbarton Bridge - Midspan (Fremont). Lane affected. Expect delays.
High Accident
Alameda 1 month ago
CHP : Disabled vehicle on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). Lane affected. Expect delays.
High Accident
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, June 19, 2026 to 5:00 AM Saturday, June 20, 2026.
Construction
Alameda 1 month, 1 week ago
Caltrans : Roadwork on CA-84 Westbound at Mission Blvd (Fremont). Lane closed. One way traffic control in effect. From 8:00 PM Thursday, June 18, 2026 to 5:00 AM Friday, June 19, 2026.
Construction
Alameda 1 month, 1 week ago
Caltrans : Roadwork on CA-84 Eastbound and Westbound between Pleasanton Sunol Rd (Scotts Corner) and Kilkare Rd (Sunol). All lanes closed. Avoid the area. From 8:00 PM Wednesday, June 17, 2026 to 5:00 AM Thursday, June 18, 2026.
Construction
Alameda 1 month, 1 week ago
Caltrans : Roadwork on CA-84 Westbound at Mission Blvd (Fremont). Lane closed. One way traffic control in effect. From 8:00 PM Wednesday, June 17, 2026 to 5:00 AM Thursday, June 18, 2026.
Construction
Alameda 1 month, 1 week ago
CHP : Traffic Hazard on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). Lanes affected. Expect delays.
High Accident
San Mateo 1 month, 1 week ago
Caltrans : Roadwork on CA-84 Eastbound and Westbound between Pleasanton Sunol Rd (Scotts Corner) and Kilkare Rd (Sunol). All lanes closed. Avoid the area. From 8:00 PM Friday, June 12, 2026 to 5:00 AM Saturday, June 13, 2026.
Construction
Alameda 1 month, 2 weeks ago
CHP : Traffic Hazard on CA-84 Westbound east of Dumbarton Bridge - Toll Plaza (Fremont). Right shoulder affected. Expect delays.
High Accident
San Mateo 1 month, 2 weeks ago
CHP : Traffic Collision on CA-84 Westbound west of US-101 S (Redwood City). Lanes blocked. Expect delays.
High Accident
San Mateo 1 month, 2 weeks ago
Caltrans : Roadwork on CA-84 Eastbound and Westbound between Pleasanton Sunol Rd (Scotts Corner) and Kilkare Rd (Sunol). All lanes closed. Avoid the area. From 8:00 PM Thursday, June 11, 2026 to 5:00 AM Friday, June 12, 2026.
Construction
Alameda 1 month, 2 weeks ago
CHP : Grass fire on CA-84 Westbound exiting at Thornton Ave (Newark). Off Ramp affected. Expect delays.
High Accident
Alameda 1 month, 2 weeks ago
CHP : Traffic Collision on CA-84 Westbound west of Little Valley Rd (Sunol). Lane affected. Expect delays.
Moderate Accident
Alameda 1 month, 2 weeks ago
Caltrans : Roadwork on CA-84 Eastbound and Westbound between Pleasanton Sunol Rd (Scotts Corner) and Kilkare Rd (Sunol). All lanes closed. Avoid the area. From 8:00 PM Friday, June 05, 2026 to 5:00 AM Saturday, June 06, 2026.
Construction
Alameda 1 month, 3 weeks ago
Caltrans : Roadwork on CA-84 Eastbound and Westbound between Pleasanton Sunol Rd (Scotts Corner) and Kilkare Rd (Sunol). All lanes closed. Avoid the area. From 8:00 PM Thursday, June 04, 2026 to 5:00 AM Friday, June 05, 2026.
Construction
Alameda 1 month, 3 weeks ago
CHP : Brush fire on CA-84 Westbound east of Ardenwood Blvd (Newark). Right shoulder affected. Expect delays.
Moderate Accident
Alameda 1 month, 3 weeks ago
Caltrans : Roadwork on CA-84 Eastbound and Westbound between Pleasanton Sunol Rd (Scotts Corner) and Kilkare Rd (Sunol). All lanes closed. Avoid the area. From 8:00 PM Wednesday, June 03, 2026 to 5:00 AM Thursday, June 04, 2026.
Construction
Alameda 1 month, 3 weeks ago
CHP : Traffic Hazard on CA-84 Westbound at Dumbarton Bridge - Midspan (Fremont). Lanes blocked. Expect delays.
High Accident
Alameda 1 month, 3 weeks ago
CHP : Disabled vehicle on CA-84 Westbound at Dumbarton Bridge - Midspan (Fremont). Right lane blocked. Expect delays.
High Accident
Alameda 1 month, 3 weeks ago
Caltrans : Roadwork on CA-84 Eastbound and Westbound between Pleasanton Sunol Rd (Scotts Corner) and Kilkare Rd (Sunol). All lanes closed. Avoid the area. From 8:00 PM Tuesday, June 02, 2026 to 5:00 AM Wednesday, June 03, 2026.
Construction
Alameda 1 month, 3 weeks ago
CHP : Disabled vehicle on CA-84 Westbound east of I-880 N (Fremont). Right shoulder affected. Expect delays.
Moderate Accident
Alameda 1 month, 4 weeks ago
CHP : Traffic Hazard on CA-84 Westbound east of Dumbarton Bridge - Midspan (Fremont). Left and center lanes blocked. Expect delays.
High Accident
Alameda 2 months ago
CHP : Disabled vehicle on CA-84 Westbound east of Dumbarton Bridge - Midspan (Fremont). 2nd lane from the left blocked. Expect delays.
High Accident
Alameda 2 months 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.
High Accident
Alameda 2 months ago
CHP : Traffic Hazard on CA-84 Westbound west of Thornton Ave (Newark). Lane affected. Expect delays.
Moderate Accident
Alameda 2 months ago
CHP : Traffic Hazard on CA-84 Westbound west of Dumbarton Bridge - Toll Plaza (Fremont). Right lane affected. Expect delays.
High Accident
Alameda 2 months, 1 week ago
Caltrans : Roadwork on CA-84 Westbound between Pleasanton Sunol Rd (Scotts Corner) and Kilkare Rd (Sunol). All lanes closed. Avoid the area. From 8:00 PM Tuesday, May 19, 2026 to 5:00 AM Wednesday, May 20, 2026.
Construction
Alameda 2 months, 1 week ago
Caltrans : Roadwork on CA-84 Westbound at Alameda De Las Pulgas (Redwood City). Lane closed until 3 PM. From 9:00 AM Tuesday, May 19, 2026 to 3:00 PM Tuesday, May 19, 2026.
Construction
San Mateo 2 months, 1 week ago
📍 Top Cities on CA-84 W
Alameda 65 San Mateo 45
Other Major Highways
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