CHICAGO/LAC-MEGANTIC, Quebec (Reuters) - The short length of track, nestled in a dark pine and birch forest in Quebec, is a regular overnight stop for freight trains hauling crude oil and other raw materials across North America.
Normally, before retiring for the night, the train operator sets the hand brakes and leaves one locomotive running to power the air brakes that help hold the train in place on the gently sloping track. The next morning, the operator or a relief engineer starts up the train and continues on their way.