text: Stores are placed a walk away on main street, rather than in malls along some distant highway. Paris enforced partial driving ban to clear the air of the global city. Day without cars is part of an improvement campaign that began in Bogota in the mid 1990s. pitted side walks have been replaced by broad smooth sidewalks rushhour restrictions have dromatically cut traffic and new restorants and upscale shopping districts have crapped up. In the United States the rates of car ownership houshold and person started to come down two to three years before the downturn said Micheal sivak who's a reaserch professormof the university of Michigan's transportation reaserch institute study last found that driving by young people decreased 23 percent between 2001 and 2009.    Driverless cars are smart cars that are able to drive with little to no help from the driver. This means the car is able to use gas and brakes by its self, while also steering itself. The idea of driverless cars is great for countless reasons. They are helping with less crashes, they can still alert drivers for danger ahead, and can have a better response to dangers from skids or rollovers.