These technologies have gained a lot of ground over the past few years. They've been tested in a pilot in the streets of Ann Arbor, Michigan. Carmakers themselves have developed their own systems to sell in luxury models. There are still some hurdles for the tech to overcome, especially if cities want their own infrastructure to talk to these smarter cars, too—to monitor traffic, for example. But many experts agree they'll make our roads safer by reducing deadly human error. The National Highway Traffic Safety Administration, which is in charge of deciding whether car-to-car communication should be mandated by law, thinks the tech could prevent 80 percent of light vehicle crashes. Nevertheless, the Auto Alliance, a major carmakers' organization, opposes mandatory car-to-car communications, The Detroit News reports.