Dangers in making vehicles communicate
As an IT professional, I can say that this needs to be further researched. Some WiFi car systems have already been hacked. A hacker could sit in a vehicle next to yours and send/received data to/from your car. A test was done to a WiFi communications system between 2 cars (American company, don't remember which). The friendly hacker made the other vehicle stop, reduce speed, etc., all from his computer.
Technology has to get way better, and still, there would always instances in which these systems malfunction or are hacked. Imagine, having a car accident because your autonomous vehicle made a wrong decision (malfunction, or because it was hacked), scary.
