Coxster said:It allows you to jump onto an AI train and then you can drive it. The train you jumped from will then become AI. This means you could arrive at a terminous then drive another train back where you came from. It also seems there will be AI in explore mode so you could drive anywhere and still have passing trains.
There are three modes, one of which isn't designed for jumping as it is meant to be like real life where you are assigned duties.