I was hoping you could add the feature to trains to add a logistic network with signals and everything. I think in a game with complex factories, would at least be able to add this. This would allow multiple trains to be on the same track and to operate at the same time. Signals and switches should control the tracks as well as automatically have trains stop to wait as another train passes. This would allow very complex rail networks similar to real life.
Also please add a way to ride on the automated train. Just as a passenger and you couldnt control it because being in the engine car doesnt allow the automatic system to work.