I can explain why. When someone does something stupid like that in the middle lane, there are two choices, speed up or slow down. If I'm rather close to the person it's usually best to speed up and get away before they do the next dumb thing. However, if behind and further back, slowing is the best option because one has to be ready for the next stupid move or someone avoiding the person who made the stupid move. Not to mention people who take risks to get by someone who is needlessly slowing traffic. (aka scott's sloth kills)
Exactly. It's these things that cause the jams and reduce travel speeds.
Exactly. This is a form of what I call "consideration" in quotes. It puts the needs of one person over those of everybody else. Usually it requires one selfish person trying to jam their way in and one enabler who lets them. However, in some instances, just the enabler. I see the later usually when I am using the bicycle. Someone will stop and wave me through. I didn't want them to do, they just did it, screwing up the flow, my timing, etc because they had to be "considerate".
