text: One reason why the smart cars should be on the road is that they are better on fuel. Google cofounder Sergey Brin says that he envisions a future with a public transportation system where fleets of driveless cars form a public-transport taxi system. He also says that the cars he forsees would use half the fuel of today's taxis and offer more flexibility than a bus. Television and movies have long been fascinated with cars that could drive themselves. Google has had cars that could drive independently under specific conditions since 2009.