Quote:
Originally Posted by jamesqf
It also depends a lot on how much wear the road has had. I haven't driven it recently, but there was a time when the stretch of I-80 between Donner Summit and (roughly) Auburn was so badly worn that I was worried about high-centering the Insight on the ruts worn into the concrete. It was also quite rough, with the concrete worn well down into a layer of about 2" or larger aggregate...
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I'd put that down to bad concrete or bad workmanship in designing or building the road - and most importantly its foundations.
The concrete slabs tend to crack and rise or settle, but the continuously laid concrete has none of those issues.
We only have ruts in asphalt roads as asphalt is too maleable under heavy load - which increases rolling resistance.
During winter the top asphalt layer comes off as water gets into it, then freezes and cracks the asphalt into pieces.