Major Traffic Disruptions After SR-57 Collision

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

📍 San Dimas, CA

📅 Published: March 18, 2025 at 09:39 PM

🔄 Updated: March 18, 2025 at 10:34 PM

Map showing the location of the accident in San Dimas, CA
San Dimas, March 18, 2025 -

A traffic collision involving two vehicles, a semi truck and a black sedan, occurred today on the northbound lanes of State Route 57 (SR-57) in San Dimas, CA. The incident took place around 9:00 PM, leading to significant traffic disruptions in the area.

The black sedan was reported to have sustained damage and was scheduled for towing, while the semi truck remained at the scene for further investigation. Traffic flow was impacted as lane slowdowns were noted, particularly from the Arrow Highway on-ramp, where emergency responders implemented controlled directional flow to manage congestion.

Motorists traveling northbound on SR-57 experienced delays as multiple units were deployed to ensure the safe management of traffic during the incident. The situation was further complicated by the semi truck's presence, which was observed to have possibly taken the westbound 210 Freeway after the collision.

As responders worked to clear the scene, the Arrow Highway on-ramp to northbound SR-57 was temporarily held to facilitate the towing of the black sedan. Drivers are advised to exercise caution and anticipate delays in the area as the situation unfolds.

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.