While playing in 3d person POV you are looking at your character all the time, why not to make it what you want, if a game give you a choice, because many games don't.

Werner von Siemens initially proposed this system for Berlin, but they decided to go with conventional trains for U-bahn, so Siemens company build this in Wuppertal

There were serious plans in building urban-rail system with central station on Red squire in Moscow. Such projects appeared both before and after revolution, including Berlin-type system build by Siemens.