Accident High Severity Resolved

CHP : Traffic Hazard on US-101 Southbound ramp to I-380 W (South San Francisco). Connector ramp blocked. Expect delays.

A high-severity accident was reported on US-101 S near San Mateo on June 27, 2026 at 1:41 AM.

Road

US-101 S

Area

San Mateo

Address

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Started

Jun 26, 6:41 PM

Last Updated

1 month ago

Jun 26, 7:30 PM

Resolved

Jun 27, 1:45 AM

Coordinates

37.6382, -122.4053

Update History

2 observations

CHP : Traffic Hazard on US-101 Southbound ramp to I-380 W (South San Francisco). Connector ramp blocked. Expect delays. Jun 26, 7:30 PM

CHP : Traffic Hazard on US-101 Southbound north of I-380 W (South San Francisco). 2nd lane from the left affected. Expect delays. Jun 26, 7:15 PM

Source: 511_sfbay · ID 511.org/1513812 First seen Jun 26, 2026 7:15 PM