Good point. The autobahn has a 24 inch total thickness includes freeze resistant concrete road and road bed. Very few problems with the surface. Constant inspections take place.
As for Raleigh? Boy the inner belt line just doesn't seem to want to hold up does it? They pave it and 3 months later you've got ridges and cracks in it. Then come the pot holes.......but other sections seem to last quite awhile. I don't get it...
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