Accident High Severity Resolved

CHP : Traffic Hazard on I-280 Southbound entering at Mariposa St (San Francisco). On Ramp affected. Expect delays.

A high-severity accident was reported on I-280 S near San Francisco on October 21, 2026 at 4:07 PM.

Road

I-280 S

Area

San Francisco

Address

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Started

Oct 21, 9:07 AM

Last Updated

6 days, 5 hours ago

Oct 21, 9:30 AM

Resolved

Oct 21, 3:30 PM

Coordinates

37.7614, -122.3926

Update History

2 observations

CHP : Traffic Hazard on I-280 Southbound entering at Mariposa St (San Francisco). On Ramp affected. Expect delays. Oct 21, 9:30 AM

CHP : Traffic Hazard on I-280 Southbound at Mariposa St (San Francisco). Lanes affected. Expect delays. Oct 21, 9:15 AM

Source: 511_sfbay · ID 511.org/1566675 First seen Oct 21, 2026 9:15 AM