Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Westbound west of Alhambra Ave (Martinez). Lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on September 12, 2026 at 3:36 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 11, 8:36 PM

Last Updated

1 month, 2 weeks ago

Sep 11, 8:45 PM

Resolved

Sep 12, 2:45 AM

Coordinates

37.9907, -122.1305

Update History

1 observations

CHP : Traffic Collision on CA-4 Westbound west of Alhambra Ave (Martinez). Lane affected. Expect delays. Sep 11, 8:45 PM

Source: 511_sfbay · ID 511.org/1548257 First seen Sep 11, 2026 8:45 PM