Accident High Severity Resolved

CHP : Traffic Collision on I-280 Northbound at Westborough Blvd (South San Francisco). Off Ramp affected. Expect delays.

A high-severity accident was reported on I-280 N near San Mateo on July 20, 2026 at 3:58 AM.

Road

I-280 N

Area

San Mateo

Address

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Started

Jul 19, 8:58 PM

Last Updated

1 week, 3 days ago

Jul 19, 9:15 PM

Resolved

Jul 20, 3:30 AM

Coordinates

37.6459, -122.4496

Update History

1 observations

CHP : Traffic Collision on I-280 Northbound at Westborough Blvd (South San Francisco). Off Ramp affected. Expect delays. Jul 19, 9:15 PM

Source: 511_sfbay · ID 511.org/1523359 First seen Jul 19, 2026 9:15 PM