The "left lane" is the new "right lane."
There is a whole gigantic cadre of dull-witted drivers who fail to appreciate the most basic rules of driving, who believe the a lane is a lane. They are the ones driving at or below the speed limit in the left lane.
On my daily commutes, I typically find the left lane clogged with these four-wheeled embolisms, and yet the right lane is clear as...something that's really clear.
Don't they teach drive right, pass left anymore? Or is it presumptuous of me to think these feebs were ever actually taught to drive?