Not all road structures are equal (it's easy to design a road to last 20 years before resurfacing almost regardless of the loads put on it, and the cost varianc

Not all road structures are equal (it's easy to design a road to last 20 years before resurfacing almost regardless of the loads put on it, and the cost variances aren't that major). Temperature variations are a bigger limiter of life of a road, especially freeze-thaw cycles