Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound west of Alhambra Ave (Martinez). Center lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on May 9, 2026 at 1:02 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

May 8, 6:02 PM

Last Updated

5 months, 2 weeks ago

May 8, 6:30 PM

Resolved

May 9, 12:30 AM

Coordinates

37.9900, -122.1339

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound west of Alhambra Ave (Martinez). Center lane affected. Expect delays. May 8, 6:15 PM

Source: 511_sfbay · ID 511.org/1492044 First seen May 8, 2026 6:15 PM