The set of item I made for my map Lost In The Fog.

Wood Roads

There are a bunch of footbridge type roads and borders. Borders and roads are separated so you can mix them however you want. Screws on the road are not collidable, and the road is actually asphalt, so it drives exactly as usual, just different curves and slopes.

Invisible roads

For the invisible roads, I let them in the set even tho it's very hard to use without knowing how to use the mesh editor a bit. My way to use them is to make them visible, place them, then turn them invisible again. To make sure I can still click them while invisible, I let a smaller version of their mesh float somewhere 50 meters under the actual invisible road. When editing the item, the visible component of the road should be a layer named "DebugVisible". Turn this layer back on to have the road visible, and turn it off to make the road invisible.

Lights

The two small orange and blue blobs are not collidable. I used them to show the borders of the invisble roads in my map. Notice that the orange pole light is missing, only the blue one is in the set. The orange pole light is taken from my other set :

Medieval Siege Set (With knights)by Yorsh | 12 | 5937 | 1009

If you want to edit the items

I made most of the items in Blender, and for some reasons those can't be edited in game. If you need to edit the items, just ask me and I can provide you with the blender files or make a small changes or two.