Quote:
Originally Posted by euromodder
I'd put that down to bad concrete or bad workmanship in designing or building the road - and most importantly its foundations.
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I'd put it down to heavy traffic combined with lack of maintenance by California. Also, this is a road going over a fairly high mountain range, which means that it gets frequent snowstorms (and ice, etc), so it is frequently sanded. Car & truck tires continually rub that grit against the road surface, so it's acting as a pretty good abrasive.