> Road damage scales as the _fourth power_ of the axle weight. I’ve seen numbers that state the road damage caused by one truck is equivalent to several ten th

> Road damage scales as the _fourth power_ of the axle weight. I’ve seen numbers that state the road damage caused by one truck is equivalent to several ten thousand cars. (Usually numbers between 10k and 40k). That seemed hard to believe when I first heard it, but the fourth power you mention is the explanation for that insane number.