Vehicle to vehicle communications is being pushed and standardized as a traffic safety solution. The idea is that vehicles talking and communicating their actions allows them to make proper decisions.
At the same time, in the minds of some futurists is the doomsday scenario of machines becoming powerful enough to overtake humans. Recently Facebook shut down it's chatbot due to the text AI developing its own language that was unable to be understood by humans.
http://www.snopes.com/facebook-ai-developed-own-language/
Should we be even more worried about sitting in self-driving vehicles without steering wheels and that constantly communicate and talk with each other?