Accident High Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound ramp to I-680 N (Martinez). Connector ramp affected. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on April 16, 2026 at 1:37 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Apr 15, 6:37 PM

Last Updated

1 month, 3 weeks ago

Apr 15, 6:45 PM

Resolved

Apr 16, 12:45 AM

Coordinates

37.9956, -122.0698

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound ramp to I-680 N (Martinez). Connector ramp affected. Expect delays. Apr 15, 6:45 PM

Source: 511_sfbay · ID 511.org/1481858 First seen Apr 15, 2026 6:45 PM