The idea of autonomous cars, though far from mainstream, was made popular—and possible—by Google’s driverless car. The system, which won the 2005 DARPA Grand Challenge, most recently made strides in California and Nevada, which passed laws permitting the operation of driverless cars.
In May 2012, the Nevada Department of Motor Vehicles issued the first license for a self-driven car to a Toyota Prius modified with Google’s experimental technology.