Reason for Rail Outage Still ‘Under Investigation’ After Thousands Stranded in GTA

A man walks along an empty platform as a train stands idle at Toronto's Union Station after GO Transit and UP Express announced trains are not running on the entire network on Oct. 3, 2023. The Canadian Press/Chris Young

Questions remain around the root cause of the massive outage on CN Rail lines that delayed thousands of Toronto-area commuters for hours on Tuesday.

In a statement that evening, Canadian National Railway Co. said the reason for the digital disruption was still under investigation.