On , at approximately 1510 Atlantic Daylight Time, a Canadian National Railway Company (CN) freight train was travelling westward on the CN Sussex Subdivision when its last 4 cars derailed at Mile 32.7.
On , a Canadian National Railway Company (CN) freight train (CN 372) was traveling east on the south main track of the CN Kingston Subdivision when it passed a signal displaying a stop indication at Mile 69.4 (Wesco) near Cornwall, Ontario.
At the same time, a VIA Rail passenger train (VIA 67) was traveling west on the same track toward the CN train.
On , commuter train EXO 1212, consisting of a locomotive and 3 multilevel passenger cars with 8 passengers and 2 crew members on board, was stopped at the EXO Saint-Léonard - Montréal-Nord station, at Mile 135.8 of the CN St-Laurent Subdivision.
With a view to advancing transportation safety, the TSB is publishing data from its Rail Occurrence Database System (RODS) on reportable accidents and incidents (which together are called occurrences) for use by industry and the public. The TSB gathers these data in the course of its investigations and uses them to analyze safety deficiencies and identify risks in the Canadian transportation system.
Investigations conducted by the Transportation Safety Board of Canada (TSB) are complex – an accident is never caused by a single factor. The June 2016 uncontrolled movement of railway cars at MacMillan Yard in Vaughan, Ontario, was no exception. Many factors contributed to the accident, the details of which are contained in the 11 findings as to causes and contributing factors. The investigation established 6 additional findings, including 3 findings as to risk.
On 17 June 2016, a Canadian National Railway (CN) crew was performing switching operations using a remote control locomotive system in MacMillan Yard, located in Vaughan, near Toronto, Ontario.
