One large metropolis might have several different train systems, from local intercity lines to commuter trains to longer regional lines.When designing a system of train tracks, stations, and schedules in this network, should rail operators assume each entity operates independently, seeking only to maximize its own revenue? Or that they fully cooperate all the time with a joint plan, putting their own interest aside?In the real world, neither assumption is very realistic.Researchers from MIT and ETH Zurich have developed a new planning tool that mixes competition and cooperation to help…
