Vehicles were reported involved in a traffic collision of unknown injury status on the Westborough Boulevard eastbound on-ramp to northbound Interstate 280 on September 22, 2026. The incident was recorded at about 3:41 p.m. in the San Francisco area.
The collision location was identified as the Westborough Boulevard eastbound on-ramp leading to northbound I-280. CHP dispatch information did not specify the number or types of vehicles involved.
By 3:56 p.m., CHP reported that other vehicles were having to move onto the gravel shoulder to get around the collision scene. The maneuver was occurring near a blind curve, creating an obstruction for approaching traffic.
The dispatch classified the incident as involving unknown injuries. No additional information about injuries, vehicle damage, lane closures or the eventual clearing of the roadway was provided.
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