Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Westbound east of Center Ave (Martinez). Right lane blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on September 20, 2026 at 6:57 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 19, 11:57 PM

Last Updated

1 month, 1 week ago

Sep 20, 12:30 AM

Resolved

Sep 20, 6:30 AM

Coordinates

37.9964, -122.1170

Update History

1 observations

CHP : Traffic Collision on CA-4 Westbound east of Center Ave (Martinez). Right lane blocked. Expect delays. Sep 20, 12:15 AM

Source: 511_sfbay · ID 511.org/1552075 First seen Sep 20, 2026 12:15 AM