connected path

lower and upper level of multilevel parking lot do not actually connect by car, which previously resulted in incorrect navigation. I attempted to reflect this by creating two separate roads, and changing the levels of the roads. I will need to fix exact p

fixed overlap

fixed a few small issues

assigned role "inner" to grass median in relation to road

fixed building overlap

added description to previous change.

marked left turn as impossible, for construction. "construction vehicles only, no turn" written on signs.