Washboard Dirt Road
Date: Summer 2011
Why does a dirt road develop "wash-boarding?" I live on a
dirt road. A road scraper comes through periodically and smoothes the
road. Within a week, the road will have a wash-board effect that is
very bumpy and violent on a vehicles suspension.
The quick answer is the cause is none of the causes you might think.
"Washboarding", as it is called, is really pretty complicated, even
though it has been studied seriously. A recent site provides details
that are too long for NEWTON response. See:
There are a number of other sites if you Google "washboarding".
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Update: June 2012