When i was trying to make my town I realised that you cannot create bridges or road ramps. The map small town has that example where theres a ramp and a bit of a bridge. But you cannot create it by choosing the items from your inventory. Adding these props will be a great help and make small towns or cities better with overpasses or bridges. Also another reason is that it would be great for police chases or races which would make it more exciting and fun. I hope i have given enough reasons and details for people to understand. It would be great if this feature was added.