text: Beginning with paragraph two, it states that Google has had cars that could drive independently under specific directions since 2009. I have one question regaurding that statement and that is, if these cars have been around for seven years already, why are they not the main source of transportation yet? The only answer to that is that these cars are not the most efficient way of transportation. In paragraph three, the author states that the "smart-road system", the only way for these driverless cars to travel, would require massive upgrades to existing roads. If we are being practical, it would not be possible for every road to be rebuilt so that it is sustainable for these driverless cars to operate on. In addition to that, how would we travel in the meantime while the roads are being rebuilt? It is simply not practical to do that with our busy societies today.