Four-Vehicle Collision Causes Major Traffic Disruptions

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

📍 Diamond Bar, CA

📅 Published: May 10, 2025 at 03:00 AM

Map showing the location of the accident in Diamond Bar, CA
Diamond Bar, May 9, 2025 -

A traffic collision involving four vehicles occurred today on State Route 57 North near the Diamond Bar Boulevard off-ramp in Diamond Bar, CA. The incident was reported at approximately 10:23 PM, leading to significant traffic disruptions in the area. Emergency traffic management units were deployed to the scene to oversee the situation and implement controlled lane closures to ensure safety for all motorists.

As the response unfolded, traffic management teams worked efficiently to clear the roadway. By 11:32 PM, the road was reported clear through Phillips Ranch, allowing traffic to resume normal flow. However, motorists experienced delays and congestion during the incident, particularly in the slow lane where the collision took place.

Tow trucks were called to assist with the removal of the vehicles involved, and by 2:43 AM, all necessary vehicles had been cleared from the scene. The prompt response from emergency units helped minimize the impact on traffic, facilitating a swift return to normal conditions.

Motorists are advised to remain cautious when traveling through this area, especially during peak hours when traffic incidents can lead to backups. This traffic incident highlights the importance of safe driving practices on California highways.

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