>Buses and trains are. They are still subsidized (at least in the US). Almost all public transit in the US isn't self-sustaining based on its fares. The road

>Buses and trains are. They are still subsidized (at least in the US). Almost all public transit in the US isn't self-sustaining based on its fares. The road tax in gasoline is similar. Additionally, most of the wear on roads comes from tractor trailers, which is why they are taxed additionally.