Accident High Severity Resolved

CHP : Traffic Collision on CA-4 Westbound east of San Jose Ave (Antioch). Lane affected. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on June 18, 2026 at 12:14 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jun 18, 5:14 AM

Last Updated

13 hours, 32 minutes ago

Jun 18, 5:30 AM

Resolved

Jun 18, 11:30 AM

Coordinates

37.9407, -121.7400

Update History

1 observations

CHP : Traffic Collision on CA-4 Westbound east of San Jose Ave (Antioch). Lane affected. Expect delays. Jun 18, 5:30 AM

Source: 511_sfbay · ID 511.org/1509825 First seen Jun 18, 2026 5:30 AM