Car drivers don't pay for the damage that 18-wheelers do to the roads in any different way than bike drivers.
When taxes are approximated as first to second order of weight and damage is fourth, the calculus is lower weight cars are shouldering unequal cost of 18 wheelers vs everyone else including cyclist consumers. Effectively part of this is shouldered of free riding cyclists consumption of 18 wheeler goods.
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Weathering is marginal as the Chernobyl photos are proof of.
Car drivers don't pay for the damage that 18-wheelers do to the roads in any different way than bike drivers.
When taxes are approximated as first to second order of weight and damage is fourth, the calculus is lower weight cars are shouldering unequal cost of 18 wheelers vs everyone else including cyclist consumers. Effectively part of this is shouldered of free riding cyclists consumption of 18 wheeler goods.
Weathering varies widely by climate. Drive around Michigan in the early Spring and look how badly damaged the roads are due to frost heaves.