Major Traffic Disruptions on State Route 57

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

📍 Diamond Bar, CA

📅 Published: September 29, 2025 at 01:03 AM

Map showing the location of the accident in Diamond Bar, CA
Diamond Bar, September 29, 2025 -

A traffic collision on State Route 57 North in Diamond Bar, CA, caused significant disruptions early this morning. The incident, which occurred around 12:32 AM, involved three vehicles, including a white Toyota that was rendered not drivable. Debris from a deer was reported on the roadway, prompting immediate emergency traffic management measures.

Local authorities coordinated with Santa Ana to control the scene and manage lane closures effectively. As a result of the collision, traffic flow was impacted, leading to potential delays for motorists in the area. Drivers were advised to exercise caution and consider alternate routes to avoid backups and congestion.

Emergency responders arrived promptly to assess the situation and ensure the safety of all involved. A tow truck was called to the scene to assist with the removal of the vehicles, which helped facilitate the restoration of normal traffic conditions.

Motorists traveling on State Route 57 North should remain alert for ongoing traffic management efforts as cleanup continues. The California Highway Patrol is actively working to clear the debris and reopen all lanes as quickly as possible. Commuters are encouraged to stay updated on traffic conditions and plan their journeys accordingly.

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