Accident Moderate Severity Stale

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

A injury accident was reported on CA-4 W near Contra Costa on April 28, 2026 at 2:29 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Apr 28, 7:29 AM

Last Updated

1 hour, 15 minutes ago

Apr 28, 7:45 AM

Coordinates

37.9948, -122.0695

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of I-680 N (Martinez). Right lane affected. Expect delays. Apr 28, 7:30 AM

Source: 511_sfbay · ID 511.org/1487042 First seen Apr 28, 2026 7:30 AM