Accident High Severity Stale

CHP : Traffic Collision on CA-4 Eastbound ramp to I-680 S (Martinez). Connector ramp affected. Expect delays.

A high-severity accident was reported on CA-4 E near Contra Costa on October 27, 2026 at 4:15 PM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Oct 27, 9:15 AM

Last Updated

23 minutes ago

Oct 27, 10:15 AM

Coordinates

37.9943, -122.0702

Update History

3 observations

CHP : Traffic Collision on CA-4 Eastbound ramp to I-680 S (Martinez). Connector ramp affected. Expect delays. Oct 27, 10:15 AM

CHP : Traffic Collision on CA-4 Eastbound ramp to I-680 S (Martinez). Connector ramp affected. Expect delays. Oct 27, 9:45 AM

CHP : Traffic Collision on CA-4 Eastbound ramp to I-680 S (Martinez). Connector ramp affected. Expect delays. Oct 27, 9:30 AM

Source: 511_sfbay · ID 511.org/1569205 First seen Oct 27, 2026 9:30 AM