There's no dependency as far as I remember, so no idea. It's possible Steam is not downloading them. Unsub-resub and try again

Any help on why these assets won't load?

cant get the tunnels

use road anarchy and fine anarhy mods to force road to switch elevation type

I have trouble from having any other form than the standard arch. How do i change it to another form as i want it to go over a road and at this moment its just a wall.