Accident High Severity Resolved

CHP : Traffic Collision on I-280 Southbound at CA-1 S (Daly City). On Ramp affected. Expect delays.

A high-severity accident was reported on I-280 S near San Mateo on July 4, 2026 at 1:33 PM.

Road

I-280 S

Area

San Mateo

Address

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Started

Jul 4, 6:33 AM

Last Updated

3 weeks, 3 days ago

Jul 4, 7:00 AM

Resolved

Jul 4, 1:00 PM

Coordinates

37.6759, -122.4697

Update History

1 observations

CHP : Traffic Collision on I-280 Southbound at CA-1 S (Daly City). On Ramp affected. Expect delays. Jul 4, 6:45 AM

Source: 511_sfbay · ID 511.org/1516693 First seen Jul 4, 2026 6:45 AM