[JadeNB]

> I would posit that road-rage would decrease if you knew that you would be driving behind/next to the same people every day - in fact, you would probably end up with some form of cooperative driving!

Interesting idea! It's probably not completely impractical to test—I know that, when I used to have a long commute, I'd recognize a fair number of fellow commuters near my home and my destination. I can't be the only one in such a position. It didn't occur to me to ask myself whether or not I was kinder to those drivers than to others that I didn't recognize, but I probably was, and I'm sure a good pollster could come up with relevant questions.