Even if we give it a bit of slack and make it a third-power-law for taxation purposes, it would still mean a large increase in tax for heavy vehicles. Or IOW,

Even if we give it a bit of slack and make it a third-power-law for taxation purposes, it would still mean a large increase in tax for heavy vehicles. Or IOW, currently heavy vehicles are free-riding, with lighter vehicles providing much of the tax revenue to fix the damage the heavies are causing.