text: Driverless cars help people save money by people not having to buy cars. The passage states in the first paragraph that, "Google cofounder Sergey Brin, envisions a future with a public transportation system with driverless cars form a public-transport taxi system." If people just call the taxi service they won't have the need for a car, so they'll save a bunch of money. With that buses and taxis would use have the fuel they use today, so it could also help with pollution. Also with the taxi system people can be picked up quicker than with taxi services we have today, so people can get to their jobs faster or anywhere.