Car-to-car communication, which was one of our 10 breakthrough technologies of 2015, is relatively easy to implement on autonomous cars that are already packed with sensors and computing hardware. Some manufacturers, like BMW and Audi, do plan for their cars to communicate with each other and even talk to street furniture, like traffic lights. But, as a recent Guardian article pointed out, others, like Waymo and Uber, rarely discuss the topic, instead preferring to suggest that their cars are genuinely independent.