Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Eastbound at I-680 S (Martinez). Right lane blocked. Expect delays.

A injury accident was reported on CA-4 E near Contra Costa on April 21, 2026 at 12:10 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Apr 20, 5:10 PM

Last Updated

6 months ago

Apr 20, 5:15 PM

Resolved

Apr 20, 11:15 PM

Coordinates

37.9943, -122.0702

Update History

1 observations

CHP : Traffic Hazard on CA-4 Eastbound at I-680 S (Martinez). Right lane blocked. Expect delays. Apr 20, 5:15 PM

Source: 511_sfbay · ID 511.org/1483815 First seen Apr 20, 2026 5:15 PM