TSB investigation determines the derailment caused by excessive truck hunting on the empty centre beam bulkhead flat car.
TSB says trains have already been ordered to travel slowly in the area due to track maintenance issues.
New standards would require the cars to have a layer of thermal protection and thicker steel walls.
Transport investigator is urging Transport Canada to quickly introduce enhanced standards to reduce the risk of spills.
Blasts were much more intense than what would be expected from the petroleum product.