Road math

25/04/2022

The Fourth Power Rule

What these researchers found is that damage to the roadbed is proportional to the 4th power of the axle load of the vehicle, and they called this “the Generalized Fourth Power Law.” This means that if you double the weight on an axle, your vehicle does sixteen times the damage to the road.
[…]
[So] the owners of large, heavy SUVs pay sixteen times what the owners of economy cars do in registration fees and gas taxes.

Oh wait, no they don’t, because we live in Bizarro Land.

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