On the head end, a three-unit spine car leads the way. Loaded with a pair of trailers and a container, this is probably yet another intermodal freight passing through.
Yet, following the spine car are not more intermodal cars, but a string of tank cars! According to federal regulations, loaded tank cars cannot be placed directly behind the locomotives in a road freight train for safety reasons. Apparently the spine car is being used to provide the necessary buffer.
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