Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound east of I-680 N (Martinez). Lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on July 17, 2026 at 12:44 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jul 16, 5:44 PM

Last Updated

1 week, 5 days ago

Jul 16, 5:45 PM

Resolved

Jul 17, 12:00 AM

Coordinates

37.9948, -122.0695

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of I-680 N (Martinez). Lane affected. Expect delays. Jul 16, 5:45 PM

Source: 511_sfbay · ID 511.org/1522145 First seen Jul 16, 2026 5:45 PM