Thanks, that helps explains why my driving experience is so poor. There isn't a national standard for the protocol so everyone gets together and has impedance

Thanks, that helps explains why my driving experience is so poor. There isn't a national standard for the protocol so everyone gets together and has impedance mismatches. That's being overly charitable though; self-driving cars, even with different protocols, won't suffer from the rubber-necking or phantom slowdown issues. Their algorithm designers might even be smart enough to relieve the pressure of virtual blockages by going a little faster than the speed limit on the outbound side(s) to relieve the pressure wave.