Zipper is best and I completely agree that "society as a whole" just doesn't understand it and are outright hostile towards the correct behaviour. Whenever tra

Zipper is best and I completely agree that "society as a whole" just doesn't understand it and are outright hostile towards the correct behaviour. Whenever traffic is slow, I make a point of always driving up exactly towards the merge and just sliding into the flow of traffic. Many many times, someone will be pissed at that, either on the way there because my lane is free, sometimes for a very very long stretch and they try to cut me off because I'm 'bypassing' the line or even at the merge, where I just let someone through but then it's my turn but they cut me off. What do these people think? The 2 lane highway is supposed to become a 1 lane highway just because there's a merge ahead (say because of an accident)? How far back is it supposed to become 1 lane? 100 meters? 500 meters? 10 kilometers? I've seen some crazy long lineups with nobody on the second lane for multiple kilometers. The line could easily have been half as long if everyone just stayed on their lane until the merge point and zippered. I remember seeing an experiment on TV (Germany) like 20 years ago, where they had a large truck adhere to the zipper rule, merging exactly where they're supposed to and filming it (doing it over and over) and there were many many cases of the truck having to brake hard as people tried to 'slip by'. This was a 'soft zipper' i.e. lots of space to the front with just lines marked out where the truck could come to a standstill/slow down and go on, so it was a safe experiment. Which ultimately is one of those cases that demonstrate that some ideas are good and 'correct' but "not implementable with humans."