Transit tubes bridge that isn't a tile

[Zarquan]

I like having one continuous fire poll from the top of the map to the bottom through the middle of my base.  I find this amusing.  Unfortunately, if I want to have a decent transit tube system that goes to both sides of the map, I have to break the fire poll to let the transit tube past, and that isn't a continuous fire poll anymore. 

I personally don't see a reason to not let transit tubes have something like a bridge to move over things like ladders but isn't a tile like the current tube crossing.