Like what? The entire layout is being redone from scratch, including a pretty large underground cave system to house the stuff not visible on the overworld. If you mean the draisines or something, they'll probably remain largely unchanged. I have had to make a lot of background changes to them to work with the new stuff(like floating tracks) and stuff like that, but they'll be working exactly the same. I may tweak their speed to start slow, but accelerate up to a fast speed(faster than they currently go), but I am undecided on that.