Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Westbound south of Arnold Industrial Way (Concord). Lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on June 28, 2026 at 6:02 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jun 27, 11:02 PM

Last Updated

4 months ago

Jun 28, 1:30 AM

Resolved

Jun 28, 7:30 AM

Coordinates

38.0028, -122.0463

Update History

4 observations

CHP : Traffic Collision on CA-4 Westbound south of Arnold Industrial Way (Concord). Lane affected. Expect delays. Jun 27, 11:15 PM

CHP : Traffic Collision on CA-4 Westbound south of Arnold Industrial Way (Concord). Lane affected. Expect delays. Jun 27, 11:00 PM

CHP : Traffic Collision on CA-4 Westbound south of Arnold Industrial Way (Concord). Lane affected. Expect delays. Jun 27, 10:45 PM

CHP : Traffic Collision on CA-4 Westbound south of Arnold Industrial Way (Concord). Lane affected. Expect delays. Jun 27, 10:30 PM

Source: 511_sfbay · ID 511.org/1514248 First seen Jun 27, 2026 10:30 PM