Actually, a train has a very low coefficient of friction once it get rolling. Grain elevator operators used to have a long lever device, fit on the track, under a wheel and lever away to where you wanted the car for loading.
Grizz
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"Indeed, no human being has yet lived under conditions which, considering the prevailing climates of the past, can be regarded as normal."
John E. Pfeiffer The Emergence of Man
written in 1969
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