construction methods are different in america and european countries in general... ALL of their roads are better than ours...
They use like 3-8 layers of different materials under the road to prevent heave and cracking...
We usually just lay down a heavy concrete slab and lay ashvalt over that... it makes for easy re-surfacing of the highways but less longevity...
Of course our surfaces are stickier and less fatique causing... WHEN they're not cracked and potholed all over..
__________________
I am an A$$hole... take anything I say to heart at YOUR OWN RISK...
|