[techdmn]

The way I like to think about is this: If I see a maniac looming in my rearview mirror, where do I want that driver to be? Surely not bottled up behind me, where they can cause all kinds of trouble. I want them out in front of me, where I can keep an eye on them and where I control the distance between us. Furthermore, I would like to put this nutjob in front of me as quickly and as cleanly as possible. Fortunately they are often happy to zip by on my left if I give them the slightest encouragement: Room to do so.

[sokoloff]

Exactly. Cars who want to go faster than me: I want them ahead of me.

For the same reason, I want cars who wish to go more slowly than I do to be behind me.