Tesla Overturns, Closes Mariposa On-Ramp to I-280

Traffic Collision on Interstate 280 South in San Francisco Causes Lane Closure Today

📍 San Francisco, CA

📅 Published: October 1, 2025 at 10:13 PM

🔄 Updated: October 1, 2025 at 11:30 PM

Map showing the location of the accident in San Francisco, CA
San Francisco, October 1, 2025 -

A traffic collision involving a single vehicle occurred today on the Mariposa Street on-ramp to Interstate 280 South in San Francisco, CA. The incident was reported around 9:44 PM when a white Tesla overturned and came to rest on its roof, resulting in lane blockages and a complete closure of the on-ramp.

Emergency responders quickly arrived at the scene to manage traffic and clear the blockage. The overturned vehicle obstructed the on-ramp lane, causing significant delays and congestion for motorists attempting to access the freeway. The closure of the Mariposa Street on-ramp impacted evening traffic flow, leading to backups in the area.

A tow truck was dispatched to assist in flipping the vehicle back onto its wheels and removing it from the roadway. The on-ramp remained closed for approximately one hour while emergency crews worked to clear the scene and restore normal traffic conditions. Authorities advised drivers to seek alternative routes during this time to avoid further delays.

This traffic incident highlights the importance of safe driving practices, especially during challenging conditions. Motorists are encouraged to remain vigilant and patient while navigating through affected areas. Updates will be provided as the situation develops.

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