Re: Cause of tunnel derailment???
I believe that the only thing known for sure right now is that, the derailment started on the Canadian side of the tunnel, so if protocol is followed, the Canadian transportation people will lead the investigation. Not to rule out the US team by any means however. There is a lot of speculation about the mid train DPU unit losing correspondence with the lead engine causing an emergency brake application somewhere withing the train. It will take time, but a cause will most likely be found. Answer could take years.
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