Major Collision Blocks Lanes on State Route 57

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

📍 San Dimas, CA

📅 Published: July 1, 2025 at 12:31 AM

🔄 Updated: July 1, 2025 at 01:31 AM

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

A significant traffic collision occurred today on State Route 57 North near Via Verde in San Dimas, CA, involving six vehicles. The incident began around 12:17 AM when a semi collided with a pickup truck, resulting in two mid-lanes being blocked. Shortly after, another semi obstructed additional lanes, leading to major traffic disruptions.

In a separate incident, a red Chevrolet Volt collided with a black tractor pulling a white trailer, further complicating the traffic situation. The red Chevrolet Volt was also found blocking a third lane with its hazard lights activated. An 18-wheeler was reported as not driveable, contributing to the congestion on the highway.

Emergency services responded quickly to manage the scene and coordinate towing operations. Multiple lanes remained blocked for an extended period, causing significant delays and backups for motorists. Traffic was reported as completely stopped at times, impacting the morning commute for many drivers.

Motorists are advised to seek alternate routes to avoid congestion as the situation is being cleared. The California Highway Patrol is on the scene to assist with traffic management and ensure the safe removal of the vehicles involved in this traffic incident.

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