[MChat]

If two lanes are merging, it should work like a zipper. If no lanes are merging and its bumper to bumper I'll usually let someone into my lane in front of me if they are signaling and actually move when I allow the space to open up (I'm not going to wait forever). If they lack the confidence to actually take the space when I open it up, I'll just go since they're usually the overly-cautious type that can't make a decision and can't seem to keep up with the cars in front of them when traffic does start to move.