Always interesting to learn such details about infrastructure "hidden in plain sight". One more I can add is the separate traction power network in Germany, Aus

Always interesting to learn such details about infrastructure "hidden in plain sight". One more I can add is the separate traction power network in Germany, Austria in Switzerland, which is necessary because the railways here use a frequency of 16,7 Hz. It is fed in part by dedicated power plants (or dedicated generators in shared power plants), in part by converters. https://en.wikipedia.org/wiki/Traction_power_network https://en.wikipedia.org/wiki/Traction_power_network https://de.wikipedia.org/wiki/Bahnstromnetz#/media/Datei:Bahnstromnetz.png https://de.wikipedia.org/wiki/Bahnstromnetz#/media/Datei:Bah...