text: The Driverless Cars are built very complex. They use a ton of sensors all around the car which most likely takes alot of money to put into building, Money that is poribably taken from taxes the government collects from the people, Alot of people would be losing money to build something that isnt 100% sure that it would even work. The article says that these self sufficiant cars have been tested to drive millions of miles without crashing, and still would need some assistants to park and back up out of parking spots.