The Transportation Safety Board (TSB) of Canada has concluded that “ice jacking” led to the February derailment of a CN (NYSE: CNI) crude oil train, releasing tens of thousands of gallons of crude.
TSB describes ice jacking as ice building up at the base of the rail and lifting the rail from the tie plate rail seat. This condition occurs when roadway snow-clearing activities push road sand, salt and snow at a grade crossing onto rail tracks. The snow melts because of the salt, but the water can...
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