this is my pet peeve - in fact, i am convinced that most expressway/freeway accidents are caused by improper lane discipline, NOT SPEEDING. these assholes cause all kinds of swerving to get by them and sooner or later they cause big problems.

it doesn't even matter what the speed limit is, if the flow of traffic is, say 100 kph, even those going 80 are going to cause major disruption. someone else said that the leftmost lane is for passing only...on the european autobahns this is strictly enforced and followed by motorists - this is why they can go for 180 mph for stretches without high accident rates.