Comment by Merovius
1. I'm not a driver, much less in a country with toll roads. But is it common to have per-vehicle customized toll prices? I would expect to pay a fixed per-car, per-use fee.
2. How is this dependent on privatization? Every car is registered. So it seems pretty easy to enforce taxes on cars. And to do so based on model, weight, whatever you want.
In other words, from what I can tell, making people pay their fair share seems simpler in a public system, if anything. It certainly doesn't require privatization.
FWIW I have little skin in the game, as I said, not a driver, so I would probably benefit both by having to pay less tax and by reducing overall car usage.
What I've commonly seen in the US is that the lowest toll is for passenger cars, and then it goes up by the number of axles that the vehicle has.