What Mini Metro can teach us about real life public transport

My friend Andrew put me onto the game Mini Metro - it's a rather addictive (at least to me) game where you design and run a metro (or tram) system. The game provides station locations, and travel demand patterns, and you have to work out how the lines should connect them. Gradually more and more locations and people are added. The game finishes when the system gets overloaded and the stations