Vehicle-to-vehicle wireless communication, which the DoT yesterday announced it was preparing to make mandatory at some future date in all new light automobiles, is designed to improve collision detection. In practice, of course, it will lead to the Pixar apocalypse, in which driverless cars roam free across the future wasteland of Radiator Springs, having first learned to say "Git 'R Done!" and then realized that humans, having come up with that catchphrase, no longer deserve to live.
Or something. Read the government press release if you want. It's long and boring apart from where they tell you what they're going to make you do at some unspecified time, and if they really wanted to sell this feature to the public, they'd enable cars to flip off other cars.