You see, progress comes with cost. But car infrastructure is so popular, because it is relatively cheap. It’s an economic problem, that has proven that the current situation is the most effective we currently have.
And in the end, some people want to drive cars in cities. Even people that live in cities want to do so.
So as the systems continues to work as it does, one has to expect, that the majority thinks the way I do. And that’s what we usually call swarm intelligence.