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Q&A How to calculate maximum altitude difference between metro stations?

For story purpose I am trying to design a mass transit system for a perfect city. Right ... maybe not so perfect, if you look carefully into the details, but actually the mass transit system is sup...

2 answers  ·  posted 7y ago by Shadow1024‭  ·  last activity 7y ago by Shadow1024‭

Question earth-like cities earth modern-age infrastructure