Traffic Disruption on State Route 57 South

Traffic Collision on State Route 57 South in Diamond Bar Causes Delays Today

📍 Diamond Bar, CA

📅 Published: September 28, 2025 at 10:34 PM

Map showing the location of the accident in Diamond Bar, CA
Diamond Bar, September 28, 2025 -

A traffic collision on State Route 57 South in Diamond Bar, CA, caused significant disruptions to traffic today. The incident occurred around 9:46 PM and involved three vehicles: a black Tesla, a maroon SUV, and an unknown SUV. The collision resulted in lane #1 being blocked, leading to congestion and delays for drivers traveling southbound at Pathfinder Road.

Emergency response units were promptly dispatched to the scene to manage traffic and ensure safety. The black Tesla was left in a position where it could not be driven, while the maroon SUV sustained visible damage. The unknown SUV's condition remains unclear.

As vehicles were obstructed, motorists faced backups and delays in the area. A tow truck was called to assist with the removal of the vehicles involved in the traffic incident.

Traffic flow was significantly impacted as crews worked to clear the scene and restore normal conditions. Motorists are advised to seek alternate routes to avoid delays as the situation develops. This traffic collision highlights the importance of safe driving and the potential for unexpected incidents on the road.

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