A multi hex building placed on rough will automagically change that rough to paved road
A Multi placed on clear terrain will not BUT..... if you beat it up with arty and create rough in that hex once the game is saved and reloaded the game will convert that rough to paved road
__________________
"You are never to old to rock and roll if you are too young to die".--- What do you expect to be doing when you are 80?