LOL...
That's a product of a driving system w/o any order to it. It's funny you say that, I often drive in the D.C. area and up I-95 to the north and find that the far right lane is the most vacant and what the left lane should be.
It's long overdue getting laws like this passed. The next step is to enforce them. Far too many routine motorists out there seem to think they have a badge and the authority to decide how fast everyone else drives. In their eyes, it's OK to go a little faster than the speed limit, but only as fast over as they're going.
The first thing I look for on those cars is a Kerry bumper sticker.
The speed limits are another thing that needs to be addressed... on most highways, if you're traveling at the speed limit, you are an obstruction on the road.