text: Companies are already, and have already, been making these computer driven cars. As an example, General Motors created a concept car that could run on a special test track. The track was embedded with an electrical cable that sent radio signals to a receiver on the front end of the car. Google made the modified Toyota Prius, and BMW announced the development of "Traffic Jam Assistant." Mercedes-Benz, Audi, and Nissan plan to have cars that can drive themselves by 2020.