Accident Moderate Severity Resolved

CHP : Traffic Collision on US-101 Southbound north of Ralston Ave (Belmont). Left lanes blocked. Expect delays.

A injury accident was reported on US-101 S near San Mateo on September 28, 2026 at 12:31 PM.

Road

US-101 S

Area

San Mateo

Address

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Started

Sep 28, 5:31 AM

Last Updated

4 weeks, 1 day ago

Sep 28, 6:30 AM

Resolved

Sep 28, 12:30 PM

Coordinates

37.5315, -122.2758

Update History

3 observations

CHP : Traffic Collision on US-101 Southbound north of Ralston Ave (Belmont). Left lanes blocked. Expect delays. Sep 28, 6:15 AM

CHP : Traffic Collision on US-101 Southbound north of Ralston Ave (Belmont). Left lanes blocked. Expect delays. Sep 28, 6:00 AM

CHP : Traffic Collision on US-101 Southbound north of Ralston Ave (Belmont). Left lane blocked. Expect delays. Sep 28, 5:45 AM

Source: 511_sfbay · ID 511.org/1555754 First seen Sep 28, 2026 5:45 AM