Skynet theories aside, the whole “AI will solve trafic” thing is just dumb. Sure, I suppose we could one day perfect a system of cars working as a hivemind to optimize the flow of trafic, but that just makes it impossible for anyone not part in that hivemind (cyclists etc.) to use the road.
I suppose the “just one more lane bro” joke sort of applies here in that the problem caused by cars would be “solved” by doubling down on cars.