The Numbers Don’t Lie: Self-Driving Cars Are Getting Good (wired.com)

But they still don't solve major transportation problems. They will never have the capacity of trains (even on self-driving-car only highways), and safety requirements will most likely lead to a situation where people will no longer be able to modify, or even own, their own cars:

http://penguindreams.org/blog/self-driving-cars-will-not-sol...