Accident High Severity Resolved

CHP : Traffic Collision with Injuries on CA-4 Westbound at Alhambra Ave (Martinez). Right lane and exit ramp blocked. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on August 11, 2026 at 3:10 PM.

Road

CA-4 W

Area

Contra Costa

Address

Loading…

Started

Aug 11, 8:10 AM

Last Updated

2 months, 2 weeks ago

Aug 11, 8:45 AM

Resolved

Aug 11, 3:00 PM

Coordinates

37.9924, -122.1251

Update History

1 observations

CHP : Traffic Collision with Injuries on CA-4 Westbound at Alhambra Ave (Martinez). Right lane and exit ramp blocked. Expect delays. Aug 11, 8:15 AM

Source: 511_sfbay · ID 511.org/1533897 First seen Aug 11, 2026 8:15 AM