Automobiles are not a mode of human transportation. They are a mode of information transportation.
The people that move inside of cars are unimportant. People live everywhere. A few more here or a few more there makes no big difference. What cars do change is that they allow people to bring what they know with them. In the 19th century, our best way of getting ideas out were letters and maybe a train ticket if we had money. People didn't learn very much about strangers from distant areas of the country, let alone of the world. The car changed that.
Cars bring together strangers and their different ideas, sometimes in surprising and hilarious ways. Right after Ben told us how he lived in an RV down by the river, Hadaken told us his story of RV living, and the strangers he met, including one man he who he knew for years before ever learning that he was a professional Nascar driver.