Autonomous cars will still need to pull over to let off passengers, where they could come into conflict with bike lanes (taxis already dangerously pull into bike lanes to drop off passengers). There is still a need for explicitly separated bike lanes and parking spots for cars.

I'm excited for the advent of autonomous cars, but their introduction is not really going to solve any of the current problems with our road network.

We have had subways, buses, and trolleys for 100 years or more. That's car sharing at scale.

Then why are people still using cars? My guess: public transportation is too slow (e.g. having to stop every couple blocks) and not granular enough (have to walk to stop, have to wait). Also it is often unpleasant, being crammed in with so many.