As more drivers turn to zero-emissions vehicles, which don't have to pay anything at the pump, California's gas tax could soon be a thing of the past. But it would be replaced by something else.
You can have tiers to solve that, like vehicles under 5000lbs pay $x per kilometer driven, vehicles between 5000lbs and 10,000lbs pay $y per kilometer driven, and vehicles over 10000lbs pay $z per kilometer driven.
My preference would be to assign an equivalent single axle load to each vehicle based on make and model or avg trailer load capacity and then scale that linearly with mileage.
You can have tiers to solve that, like vehicles under 5000lbs pay $x per kilometer driven, vehicles between 5000lbs and 10,000lbs pay $y per kilometer driven, and vehicles over 10000lbs pay $z per kilometer driven.
Wouldn’t be perfect but closer.
My preference would be to assign an equivalent single axle load to each vehicle based on make and model or avg trailer load capacity and then scale that linearly with mileage.
https://pavementinteractive.org/reference-desk/design/design-parameters/equivalent-single-axle-load/