text: These high-tech cars, once fully developed, could be much safer than current buses or taxis. Driverless cars would be completly covered in sensors, as stated in chapter 4, "Google's modified 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 inertial motion sensor." using Google's mostly-driverless car as an example. These sensors provide a, "constantly updating 3-D model of the car's surroundings." which could be programmed to be much more aware than human eyes. Sensors have been around for a while, and could provide lots of safety once fully developed.