Accident Moderate Severity Resolved

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

A injury accident was reported on CA-4 W near Contra Costa on September 17, 2026 at 12:46 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 16, 5:46 PM

Last Updated

1 month, 1 week ago

Sep 16, 7:15 PM

Resolved

Sep 17, 1:30 AM

Coordinates

37.9924, -122.1251

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Alhambra Ave (Martinez). Lane affected. Expect delays. Sep 16, 6:00 PM

Source: 511_sfbay · ID 511.org/1550491 First seen Sep 16, 2026 6:00 PM