Accident High Severity Stale

CHP : Traffic Collision on I-680 Southbound south of Alcosta Blvd (San Ramon). On Ramp affected. Expect delays.

A high-severity accident was reported on I-680 S near Contra Costa on June 1, 2026 at 2:23 AM.

Road

I-680 S

Area

Contra Costa

Address

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Started

May 31, 7:23 PM

Last Updated

1 hour, 16 minutes ago

May 31, 7:30 PM

Coordinates

37.7209, -121.9384

Update History

1 observations

CHP : Traffic Collision on I-680 Southbound south of Alcosta Blvd (San Ramon). On Ramp affected. Expect delays. May 31, 7:30 PM

Source: 511_sfbay · ID 511.org/1501896 First seen May 31, 2026 7:30 PM