Accident Resolved

CHP : Traffic Collision with Injuries on US-101 Southbound south of E Hillsdale Blvd (San Mateo). Lanes open. Expect delays.

A accident was reported on US-101 S near San Mateo on September 21, 2026 at 12:42 AM.

Road

US-101 S

Area

San Mateo

Address

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Started

Sep 20, 5:42 PM

Last Updated

1 month, 1 week ago

Sep 20, 5:45 PM

Resolved

Sep 20, 11:45 PM

Coordinates

37.5481, -122.2913

Update History

2 observations

CHP : Traffic Collision with Injuries on US-101 Southbound south of E Hillsdale Blvd (San Mateo). Lanes open. Expect delays. Sep 20, 5:45 PM

CHP : Traffic Collision with Injuries on US-101 Southbound south of E Hillsdale Blvd (San Mateo). Right shoulder affected. Expect delays. Sep 20, 5:00 PM

Source: 511_sfbay · ID 511.org/1552255 First seen Sep 20, 2026 5:00 PM

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