The car share can be replaced with self driving cars, however if you make self driving cars more attractive than cars now, you’ll shift the balance and are heading towards more car centric and therefore more hostile and less attractive places again.

It is a nice fairy tale hat self driving cars are more space efficient. Real service patterns have shown that they fill up road infrastructure more than regular cars as they will do either fill up trips or need to drive everything twice. Also, making use of these fancy advantages (higher speeds, shorter breaking distance, dynamic crissings without traffic lights) make roads much more pedstrian hostile, more highway like.