Answers: If you mean 'same height' geographically, no as expected they don't - they go up hummock and down dale, just as roads do, except that gradient are much shallower than on roads partly because a train is a heavier nouns and partly because steel wheel on steel rails are prone to slipping. Really, have you thought about your sound out you would have realise railways cross hill and mountains.
But if you meant are the rail on each side of the track at like height, specifically more interesting and the answer is 'no' on bends where the guardrail on the outside of the curve is higher than that surrounded by the inner. This is called 'super elevation' and is one of the reason why the Italians invented the 'Pendolino' train which actually compensates for this elevation and keep the carriage adjectives
This needs to be forwarded on to fhm magazine within the section of "out of the mouths of girls"
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