No one here should realistically think that Waymo can solve the main transportation problem. It will just (partially) replace Uber, Lyft, and taxis. And it will have a better passenger experience and it will also be safer. It’s obvious that cars, autonomous or not, can’t replace rail, bicycles, and walking.
I think it could solve a lot of transportation problems though. In theory if driverless vehicles were ubiquitous you'd have no on-street parking, no commercial transport in the day (do it all at night), much less traffic (just wait until your slot; maybe with peak time pricing), fewer delays due to crashes, etc.
When nobody drives manually you could even do things like getting rid of traffic lights.
But then you get into a world where people can’t cross the street (moreso than what’s already available). I recall seeing a video on YouTube that explores your suggestion to its inevitable conclusion. Additionally, this could exacerbate suburban sprawl
I don't think so - you could still have pedestrian controlled crossings - press a button and the cars will stop. You just don't need any lights.
You might not even need buttons - driverless cars are already going to have to handle zebra crossings somehow.