It unfortunately doesn't work for me, but it still looks impressive and was made with a good concept in mind. I've seen a bunch of people saying the train AI is bugged, and while I obviously don't know how your game works as well as you, I actually suspect that it may have more to do with how the train is built. After a bit of testing, the front car tried to follow the player character, and seemed to be pushed off the map by the cars behind it. If the body cars have their own movement script, double check that their actually set to follow the car in front of them.