But with more efficient use of roadway space combined with automated routing maybe it never gets to this point.
But it does. Because more efficient use of roadway space and easier-to-use vehicles both make travel by car more attractive, and so more people do it; and the evidence tells us that the increase in people doing it offsets the gains in efficiency, which is why L.A. has mile-wide freeways that still clog with traffic every afternoon.
In the right picture is a street of cars, in front of which are standing their occupants. On the left is the single bus into which they all could easily fit. The horrible inefficiency of individual automobile travel is made very apparent by such illustrations. Add to this the facts, such as, when you are sitting in your car all alone, you're less than 5% of the load being movedthe rest is car, and it's really hard to see how a company like Google, serious about making money, could be getting behind what is obviously such a bad idea.
Individual cars are the worst way to get people from one place to another, self-driving or otherwise. I think anyone developing technology meant to 'improve' individuals' driving experiences is betting on a losing horse.
Self-operated trollies (on tracks) are the best approach for now; even if we let them run on petroleum. The trolly just moves and stops where it's told to stop. If you want to get off at the next stop, hit the button by your seat and it will automatically stopyou get off and push the button on the door and send it on its way. If you are at the stop and want to get on, just push the button and it will stop for you. You wouldn't even need an operator, just a law-enforcement officer to maintain order and ensure the trolly isn't taking off too soon, etc.
Like this you don't even need roads.
Imagine how much smaller our cities could be if there weren't a parking lot between every building!
Love your enemies!