Right. So from my point of view the roads must be tunnels. You see if you are far away from your manufacturing base pulling up elements and Helium 3 you want these to be surface tunnels. You need light and its expensive to tunnel. But around your manufacturing base you can afford lighting, you want them underground so that people don't have to wear special suits for protection against cosmic rays. So where the structures are you ought to have underground tunnells. Hence giving the appearance that these tubular roads are in the middle of nowhere.
