Rail transportation safety investigation R25T0189
The occurrence
On 25 July 2025, a Canadian National Railway Company (CN) mixed-merchandise train was travelling west at approximately 30 miles per hour on the north track of the Dundas Subdivision. The train consisted of 172 cars, including 80 equipped with end-of-car cushioning devices, and was powered by three head-end locomotives and one distributed power locomotive positioned mid-train.