Cars are fun and sexy. They fit America with our proclivity to think about freedom and are compatible with the large distances between places in the US. That's what started it, then we built our living arrangements to require them and are now
dependent upon them for the most part and due to a kind of overpopulation (aka traffic) it's not even fun and sexy any more and it's extremely expensive to maintain and run the roads, bridges, parking garages, traffic signals and all the private expense of gas, maintenance, damage repair, medical costs due to accidents etc. It's quite a quandary. And many think if only the cars could drive themselves and be powered with batteries it would be fun and sexy again.
A typical "freeway" (in no sense is it free)

Everyone is trying to go somewhere that they aren't. What's wrong with where they are ?