As long as we have money and private ownership of land. Because the cost of the road is not just the road itself, but also access to the land that the road is on. There were toll roads long before there were cars and paved roads. The tolls were paid to the people who owned the land. In the world of that libertarian I was talking about, there would be no government owned land. This means that all roads would be on private land. So even if they were only dirt tracks, tolls would have to be paid to the owners of the land for the use of it (possibly not all landowners would do this, but enough would to make the process of getting around pretty much impossible). And yet, this is the kind of world that the teabaggers are trying to force on us, saying that they are trying to take back our freedoms.