Accident Moderate Severity Resolved

CHP : Traffic Collision on US-101 Southbound at E Hillsdale Blvd (San Mateo). Right shoulder affected. Expect delays.

A injury accident was reported on US-101 S near San Mateo on September 3, 2026 at 4:31 AM.

Road

US-101 S

Area

San Mateo

Address

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Started

Sep 2, 9:31 PM

Last Updated

1 month, 3 weeks ago

Sep 2, 10:45 PM

Resolved

Sep 3, 5:00 AM

Coordinates

37.5481, -122.2913

Update History

2 observations

CHP : Traffic Collision on US-101 Southbound at E Hillsdale Blvd (San Mateo). Right shoulder affected. Expect delays. Sep 2, 10:45 PM

CHP : Traffic Collision on US-101 Southbound at E Hillsdale Blvd (San Mateo). Right shoulder affected. Expect delays. Sep 2, 9:30 PM

Source: 511_sfbay · ID 511.org/1544533 First seen Sep 2, 2026 9:30 PM