never seen. the car of the future making the driver totally unnecessary. >> no hands. >> reporter: google is working on one, and the federal government is sponsoring a field test in ann arbor, michigan, with cars that automatically swerve past potential accidents and alert you to oncoming hazards. and now this at general motors' test track, i sat in the driver's seat as this cadillac at high speeds stayed in its lane. at 60 miles an hour it stopped on its own even when a car driving 30 miles slower pulled in front of us. >> we can foresee the day when vehicles will be able to completely avoid a collision. >> reporter: it's been a carmaker's dream since george jetson asset in his automated flying car. >> the vehicle can take complete control and take you to your destination in comfort, safety, and security. >> reporter: this prototype called super cruise uses radars, cameras, and gps to drive itself. hand are off the steering wheel. feet are off the pedals. i can look away.