This is a pretty good point I hadn't considered, although I do wonder why there are so many poor drivers. Staring at their cell phone GPS or built-in media centers probably has a lot to do with the distraction component. That's also an argument for more completely automated transport means.

Personally I'm all for banning cars from city centers and tearing down the suburbia commuter model, and just using cars and trucks for long-distance travel and/or hauling needs, but that's probably not very likely anytime soon.