I spent most of my adult years to about 45 in Atlanta, where the traffic is, well... legendary!! On a trip to Texas, in Louisiana on the interstate, workers had posted signs "RIGHT LANE CLOSED AHEAD." There was an orderly line of patient drivers in the left lane, and an empty right lane for three miles.
I had never seen such. I think it actually changed how I drive, knowing that someone else might be calm and predictable, and not crazy and reckless.
The two things that make for accidents are idiocy and courtesy. Being too nice, for example stopping in a moving lane to let someone in, creates hazards. IMO, the trick is to be as calm and predictable as possible.
Matt B