text: Second, I think driverless cars shouldn't be relesed because they are to exspensive. The passage says, "Toyota Prius uses position-estimating sensors on the left rear wheel, a rotating sensor on the roof, a video camera mounted near the rearview mirror, four automotive radar sensors, a GPS receiver, and an intertial motaion sensor." Having all of these sensors and be very exspenvise. And many people might not have the money to replace them if they get broken.