I live in Colorado (Larimer County) and there is a county and city level road use tax when you register your car and it aint cheap my registration was $450.
I generally find the tone of the discussion about cyclists here surprising. I'm from Germany, and while there is animosity between cyclists and car drivers, both are equally accepted on all roads (except the autobahn, of course). There's a movement in big cities towards more and more specific lanes for cyclists. I don't own a bicycle myself, but with regards to a car's emissions and the omnipresent wasteful parking slots, I'm all for strengthening the status of cyclists on roads.