Major Collision Causes Traffic Chaos in Diamond Bar

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

📍 Diamond Bar, CA

📅 Published: September 20, 2025 at 09:31 PM

🔄 Updated: September 20, 2025 at 11:00 PM

Map showing the location of the accident in Diamond Bar, CA
Diamond Bar, September 20, 2025 -

A traffic collision involving two vehicles occurred today on State Route 57 North at Pathfinder Road in Diamond Bar, CA. The incident, which took place around 6:59 PM, involved a grey 2023 Chevrolet Silverado and a black Tesla. Emergency response units were quickly dispatched to manage the scene and ensure safety for all motorists.

The traffic incident caused significant delays and congestion along State Route 57 North, impacting the evening commute for many drivers. Emergency crews implemented lane management measures to facilitate traffic flow while working to clear the scene. By approximately 7:55 PM, a tow truck was called to assist with the removal of the vehicles involved in the crash.

As the situation developed, some emergency response units began to clear the area, but motorists were advised to remain cautious due to residual traffic backup. Drivers were encouraged to seek alternate routes to avoid further delays.

This traffic incident highlights the importance of safe driving practices, especially during peak traffic hours. For ongoing updates on traffic conditions, local news sources are recommended.

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