Traffic Collision Causes Major Delays in Diamond Bar

Traffic Collision on State Route 60 in Diamond Bar Causes Delays Today

📍 Diamond Bar, CA

📅 Published: September 4, 2025 at 06:31 PM

Map showing the location of the accident in Diamond Bar, CA
Diamond Bar, September 4, 2025 -

A traffic collision involving two vehicles occurred today at the intersection of Brea Canyon Road and eastbound State Route 60 (SR-60) in Diamond Bar, CA. The incident took place around 3:56 PM and involved a white Honda and a semi-truck. Following the collision, both vehicles exited the highway at Brea Canyon and made a right turn before the crash occurred.

The California Highway Patrol (CHP) responded promptly to the scene to manage traffic and ensure safety. The collision resulted in significant traffic impacts, causing delays and congestion in the area. Emergency response units worked diligently to control the situation and facilitate the clearing of the roadway.

Motorists traveling through the intersection should anticipate traffic backup as the CHP continues to manage the scene. Lane closures were implemented, which may affect evening commuters on SR-60. Drivers are encouraged to seek alternate routes to avoid potential delays.

The CHP remains on-site to oversee traffic management and will continue to do so until the situation is resolved. As always, drivers are reminded to exercise caution and adhere to traffic regulations while navigating through the area.

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