A driverless future is coming -- but it won't start with self-driving cars

Tesla is aiming to have a fully driverless car ready by 2018, and Uber recently kicked off a pilot in Pittsburgh where select users can hail a ride in a self-driving car. And many other companies have plans to roll out some form of self-driving cars by 2020. But chances are, you're more likely to see a driverless truck in practice before a self-driving car. It's a lot easier to build autonomous tech for highway driving than city maneuvering. On highways, there are fewer obstacles for the vehicles to worry about.