Major Multi-Vehicle Collision Disrupts San Dimas Traffic

Traffic Collision on State Route 57 South in San Dimas Causes Delays Today

📍 San Dimas, CA

📅 Published: August 1, 2025 at 11:38 AM

Map showing the location of the accident in San Dimas, CA
San Dimas, August 1, 2025 -

A significant traffic collision occurred today at the intersection of State Route 57 South and Arrow Highway in San Dimas, CA, involving seven vehicles. The incident took place around 11:05 AM during the busy morning commute. The vehicles involved included a blue EMI truck, a gray Toyota Prius, a blue semi cab, a blue tractor without a trailer, and a blue vehicle identified as "SD BLKG#5."

As a result of the traffic incident, multiple lane closures were implemented, leading to traffic congestion and delays in the area. Emergency units were quickly dispatched to manage the scene and direct traffic, ensuring the safety of all motorists. The road management efforts aimed to alleviate backup and restore normal traffic flow as swiftly as possible.

Motorists traveling on State Route 57 South should anticipate significant delays due to the ongoing situation. Drivers are advised to seek alternative routes to avoid the affected area and minimize travel time. The California Highway Patrol is on-site to oversee traffic management and facilitate the safe clearance of the vehicles involved in the collision.

Updates on traffic conditions will be provided as the situation evolves. For those planning to travel through San Dimas, CA, it is recommended to allow extra time for your journey.

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