Now I am confused as to what is the asking. Today I can jump inside of a loco cab, and click on the command icon at the bottom and issue a simple stroke selecting "drive to XXX". That is all. AI finds the shortest path and go. It set's points, respects other traffic, stops at signals and all, until arriving to destination. All you have to do is enjoy the scenery. As easy as it sounds. Of course you can do more complicated things, as telling to stop on the way and for how long, when and how. Or you can set schedule library and have all this pre-programmed so all you have to do is select what you desire any time. Wonders of our simulator!