Accident High Severity Resolved

CHP : Traffic Collision on CA-4 Westbound entering at Alhambra Ave (Martinez). On Ramp blocked. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on April 8, 2026 at 2:57 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Apr 8, 7:57 AM

Last Updated

2 months ago

Apr 8, 8:15 AM

Resolved

Apr 8, 2:15 PM

Coordinates

37.9900, -122.1339

Update History

1 observations

CHP : Traffic Collision on CA-4 Westbound entering at Alhambra Ave (Martinez). On Ramp blocked. Expect delays. Apr 8, 8:00 AM

Source: 511_sfbay · ID 511.org/1478395 First seen Apr 8, 2026 8:00 AM