Yeah, I don't really understand that, but I don't doubt it is true.

I'm in a state where the state and federal gas tax as well as vehicle registration and vehicle sales tax (ugh) cover the cost of road maintenance, but it's certainly not because we don't pay a state income tax. So, one of those deals that varies by state or one of those things that's widely misunderstood - I couldn't say.

(one of the annoying things about our taxation is that owning a hybrid or electric entails a more expensive vehicle registration since you're not going to be paying as much in gas taxes. $100/yr more for a hybrid. Yuck.)