A very interesting topic.

If we have a fully-autonomous car network, we would expect all the connected cars will be continuously communicating to each other and performing negotiation.

With aviation background, I had always remember a quote within the industry 'Whose is flying the air plane'. This is very much apply to all cases, and especially to automated pilot system in the modern aircraft. Often pilots are forgetting that they should be in control of the aircraft, and not the auto-pilot computer system.