Damage to the road scales with axle load using a fourth power. Yes a fourth power. So an average truck does roughly 3000x more damage to road surfaces than an average EV.
Yet, weather influences account for the majority of road wear, so the weight of cars really does not matter at all.
I’m aware that vehicle weight is the mechanism to tax cars in many countries, but within groups this makes little sense if it is to compensate for road wear. Whether its fair to exempt EVs from road taxes is a different story, and depends on other externalities and the type of travel behaviour a government wants to promote.
Damage to the road scales with axle load using a fourth power. Yes a fourth power. So an average truck does roughly 3000x more damage to road surfaces than an average EV.
Yet, weather influences account for the majority of road wear, so the weight of cars really does not matter at all.
I’m aware that vehicle weight is the mechanism to tax cars in many countries, but within groups this makes little sense if it is to compensate for road wear. Whether its fair to exempt EVs from road taxes is a different story, and depends on other externalities and the type of travel behaviour a government wants to promote.
https://en.wikipedia.org/wiki/Fourth_power_law
Playing devils advocate the average weight of an ev is roughly a 1000lbs more than an equivalent ice car.
The weight of an average truck is roughly 80.000lbs more. Now add a power of 4 to that.
Commercial vehicle taxes are already scaled by weight and milage.