A very interesting article, but a bit of an exaggeration. Even after smart cars, people will still work in central locations, and they will start work more or less together (with some staggering of hours, of course). There would certainly be a reduction in the need for cars, but not anything like 80%, unless commuters start taking shared rides which would be a change in behavior. For the same reason, there will less need for multiple lanes, but the impact will not be as dramatic as suggested here. Finally, yes, most street parking in downtown areas will be eliminated, but there will still be need for some centralized car parks. Smart cars will have a very positive impact on transportation, but they will not eliminate all problems and they will need to be supplemented by additional solutions.