I'm not sure if it's reported already, but I discovered a duplication glitch for the road tiles:
1. Place some road.
2. Place Depot 1 tile away from road, so that it spawns a road tile to connect to the adjacent road to the Depot
3. Pickup Depot
4. Road spawned by the Depot to connect the adjacent road to the output of the depot is left behind, allowing farming of road.
Don't know how important it is for it to be fixed, but thought I'd make a bug report just in case,
