No, I mean zipper merge. Here's a brief video produced by the Minnesota Department of Transportation that explains how it works. Here's an article from the New York Times and something from Ars Technica that also says it is the most efficient use of the available roadway that explains it as well. Here are two scholarly articles 1 and 2 that show it is really the most efficient use of the road way. Feel free to flip me off while I use the road in the most efficient manner while you stew parked and angry, I'm actually not the one causing the delay, you are.