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[–] 10 points 4 months ago (1 child)

Road wear is ~n^4 where n is vehicle weight. Of course it’s because of SUVs.

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  • [–] 1 point 4 months ago (1 child)

    So if if a 400 lb motorbike costs 1 penny per mile in road damage, the 4000 lb SUV should be paying 60 bucks and the 40,000 lb tractor trailer 1 million dollars?

    Or is it divided by contact area?

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  • [–] 2 points 4 months ago

    The fourth power law (also known as the fourth power rule) is a rule of thumb which states that the stress on the road caused by a motor vehicle increases in proportion to the fourth power of its axle load.

    First line of the linked wikipedia article.

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