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this seems to have been divided into sections so that only the sections that have a car above them are powered, that seems a reasonable precaution after reading about drunk people climbing barb wire fences to piss on third rails (and families suing). Direct transfer will be more efficient.
However, speaking of electric trains, the power demands for such a system are going to be huge (though less than if everyone has to charge huge batteries at home then lug them everywhere), but huge nonetheless, i.e. people going downhill may have to feed the grid to help the people going uphill.
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