Accident Moderate Severity Stale

CHP : Traffic Hazard on CA-4 Westbound west of Alhambra Ave (Martinez). 2nd lane from the left affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on May 22, 2026 at 12:39 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

May 21, 5:39 PM

Last Updated

2 hours, 12 minutes ago

May 21, 6:00 PM

Coordinates

37.9924, -122.1251

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound west of Alhambra Ave (Martinez). 2nd lane from the left affected. Expect delays. May 21, 5:45 PM

Source: 511_sfbay · ID 511.org/1497942 First seen May 21, 2026 5:45 PM