Given that I still sometimes have trouble pairing my phone to my car, or my headphones to my phone, I think we're a long way from ubiquitous vehicle-vehicle com

Given that I still sometimes have trouble pairing my phone to my car, or my headphones to my phone, I think we're a long way from ubiquitous vehicle-vehicle communication that is reliable and secure enough to replace traffic lights. It seems the safer solution is to let the cars still vote but keep the traffic lights and let them have the final say over who gets the green. Traffic lights have fail-safes designed to make it impossible for both directions getting the green at the same time, an autonomous voting system among cars has fewer assurances of avoiding that state, even moreso if there's a malicious hacker in the mix that set up a bogus transponder at the intersection.