jarledb:The legislated purpose of RUCs is stated as: "The revenue collected from road user charges is dedicated to the National Land Transport Fund (NLTF). The NLTF funds new roads, improvements and maintenance, public transport, road safety, and walking and cycling."
I don't think the RUC system should be fair. I think an environmentally conscious government would implement a RUC system that gives a higher price per km for more polluting cars, and less for environmentally friendly cars.
With the current government that is highly unlikely to happen.
https://www.nzta.govt.nz/vehicles/road-user-charges/about-ruc/
For that reason RUC rates are best levied on the basis of vehicle weight bands.
To restructure the revenue collection system to incentivise or penalise vehicles by virtue of their energy source is outside the intent of the RUC mandate. Segregating vehicles in terms of fuel/energy use is best addressed by way of carbon taxation of the various (fossil) fuels they use and is a more elegant method of disincentivising fossil fuel use. It's not about 'fairness' so much as redesigning a taxation system to best fit the intended purposes.


