Major Collision Causes Traffic Chaos on SR-57

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

📍 Diamond Bar, CA

📅 Published: October 5, 2025 at 06:58 AM

🔄 Updated: October 5, 2025 at 08:04 AM

Map showing the location of the accident in Diamond Bar, CA
Diamond Bar, October 5, 2025 -

A traffic collision involving three vehicles occurred today on State Route 57 North near Pathfinder Road in Diamond Bar, CA. The incident took place during the morning commute at approximately 6:44 AM and involved a Tesla, a Honda, and a white Chevrolet Equinox.

The collision resulted in significant vehicle damage and blocked multiple lanes, causing traffic delays and congestion for motorists in the area. Emergency response units arrived promptly to manage the scene and direct traffic. By 7:20 AM, some lanes were reopened, helping to alleviate the traffic backup.

A tow truck was called to assist with the removal of the damaged vehicles, which were obstructing the fast lanes. By 7:43 AM, a police unit confirmed that all lanes had been reopened, allowing traffic to return to normal flow.

Motorists are advised to remain cautious while traveling through the area, as residual delays may persist following the incident. This traffic collision highlights the importance of safe driving practices, particularly during busy travel times.

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