Accident Moderate Severity Active

CHP : Traffic Collision with Injuries on CA-4 Westbound ramp to CA-160 (Antioch). Lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on October 30, 2026 at 11:40 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Oct 30, 4:40 PM

Last Updated

6 minutes ago

Oct 30, 5:45 PM

Coordinates

37.9909, -121.7630

Update History

3 observations

CHP : Traffic Collision with Injuries on CA-4 Westbound ramp to CA-160 (Antioch). Lane affected. Expect delays. Oct 30, 5:45 PM

CHP : Traffic Collision with Injuries on CA-4 Westbound ramp to CA-160 (Antioch). Lane affected. Expect delays. Oct 30, 5:15 PM

CHP : Traffic Collision with Injuries on CA-160 Northbound south of CA-4 E (Antioch). Lane affected. Expect delays. Oct 30, 4:45 PM

Source: 511_sfbay · ID 511.org/1570909 First seen Oct 30, 2026 4:45 PM