Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound east of Alhambra Ave (Martinez). Right lane blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on October 20, 2026 at 3:25 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Oct 19, 8:25 PM

Last Updated

1 week ago

Oct 19, 8:30 PM

Resolved

Oct 20, 2:30 AM

Coordinates

37.9924, -122.1251

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Alhambra Ave (Martinez). Right lane blocked. Expect delays. Oct 19, 8:30 PM

Source: 511_sfbay · ID 511.org/1566019 First seen Oct 19, 2026 8:30 PM