I hope that we can get some kind of rudimentary train system in this game. Chris Lucas was the only guy that was working on them and I believe he quit modding. The system he did was very complex also. But the map and the models do look nice. If you do leave them as props might I suggest you make them deteriorated/covered with graffiti, that would be far more realistic.
SD75M locomotive (WIP) Abandoned hotel An abandoned shed slowly decaying away in the middle of nowhere Some roads
I don't want to spam this thread with suggestions, but maybe you can do some old and abandoned horse-drawn carriages? Like this one:
Man I'm excited for this to come out, thinking about adding a little country town with a few shops and houses?