Accident Moderate Severity Stale

CHP : Traffic Collision on CA-4 Eastbound at I-680 N (Martinez). Lane affected. Expect delays.

A injury accident was reported on CA-4 E near Contra Costa on August 20, 2026 at 12:22 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Aug 19, 5:22 PM

Last Updated

17 minutes ago

Aug 19, 6:00 PM

Coordinates

37.9956, -122.0666

Update History

2 observations

CHP : Traffic Collision on CA-4 Eastbound at I-680 N (Martinez). Lane affected. Expect delays. Aug 19, 5:30 PM

CHP : Traffic Collision on CA-4 Eastbound at I-680 N (Martinez). Lane affected. Expect delays. Aug 19, 5:15 PM

Source: 511_sfbay · ID 511.org/1538018 First seen Aug 19, 2026 5:15 PM