Semi-Truck Collision Causes Major Traffic Delays

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

📍 San Dimas, CA

📅 Published: June 17, 2025 at 01:01 AM

🔄 Updated: June 17, 2025 at 04:31 AM

Map showing the location of the accident in San Dimas, CA
San Dimas, June 17, 2025 -

A traffic collision involving two vehicles, a semi truck with a white trailer and an SUV, occurred today on the northbound lanes of State Route 57 (SR-57) in San Dimas, CA, just south of Via Verde. The incident took place during the early morning hours and has resulted in significant traffic disruptions.

Due to the collision, lane closures were implemented on northbound SR-57, causing delays and backups for motorists. Traffic was also affected on the northbound lanes of State Route 71 (SR-71), leading to congestion as drivers sought alternate routes. Emergency response teams arrived promptly to manage the scene, and multiple towing units were dispatched to assist with the removal of the vehicles involved.

The SUV, a Tahoe, became lodged under the semi truck, necessitating extrication efforts. Authorities worked diligently to clear the roadway and restore normal traffic flow. As of now, only the slow lane on northbound SR-57 remains closed, while the transition road from westbound Interstate 10 (I-10) to northbound SR-57 is also impacted.

Motorists are advised to avoid the area and seek alternate routes to minimize delays as cleanup efforts continue. Updates will be provided as the situation develops.

Were you or someone you know involved in this accident?

If you would like the full incident log, we can send it to you directly.

Request Full Incident Log

Disclaimer

The content on this website is auto-generated and based on publicly available information. While we strive to provide accurate and timely updates, we cannot guarantee the accuracy, completeness, or reliability of the information presented. This content is for informational purposes only and should not be used as the basis for decision-making. We encourage you to independently verify any facts or details. For the most accurate and up-to-date information, please contact the California Highway Patrol (CHP) directly. The website and its owners are not responsible for any errors, omissions, or actions taken based on the information provided.