Backgrounder
Information about tank cars that carry flammable liquids
The occurrence
On 7 March 2015, a Canadian National Railway (CN) unit train equipped with 2 head-end locomotives hauling 94 Class 111 tank cars loaded with crude oil (Class 3 flammable liquids) was proceeding eastward on CN's Ruel Subdivision near Gogama, Ontario. The train was 5733 feet long and weighed 13,497 tons. The Class 111 tank cars were built to the CPC-1232 standard (see Figure 1).