Accident Moderate Severity Resolved

CHP : Traffic Hazard on US-101 Southbound north of I-380 W (South San Francisco). 4th lane from the left blocked. Expect delays.

A injury accident was reported on US-101 S near San Mateo on July 28, 2026 at 1:46 AM.

Road

US-101 S

Area

San Mateo

Address

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Started

Jul 27, 6:46 PM

Last Updated

20 hours, 5 minutes ago

Jul 27, 8:00 PM

Resolved

Jul 28, 2:15 AM

Coordinates

37.6371, -122.4044

Update History

2 observations

CHP : Traffic Hazard on US-101 Southbound north of I-380 W (South San Francisco). 4th lane from the left blocked. Expect delays. Jul 27, 8:00 PM

CHP : Traffic Hazard on US-101 Southbound north of I-380 W (South San Francisco). Right lane blocked. Expect delays. Jul 27, 7:15 PM

Source: 511_sfbay · ID 511.org/1527076 First seen Jul 27, 2026 7:15 PM