text: First I will explain how the whole idea of these 'driverless cars' would be too exensive. As stated in paragraph 3, "...they require massive upgrades to existing roads, something that was simply too expensive to be practical". Now in this situation, they are talking about these roadways that would control the driverless cars. But, even if we didnt make the roads entirely like suggested in the article, we would still have to change roads all across America in some ways because they wouldn't be fit for a car to control. This would also suggest that off roading, or back road driving would be very challenging for any vehical, or computer to handle.