Title says it all. Massachusetts' General Law, Title XIV, Chapter 89, Section 4B reads as follows: (Emphasis added) Most folks in Massachusetts seem to know enough to move out of the far left lane, but slow drivers abound in the center lanes of multi-lane roads here. In fact, due to the sheer volume of people going way below the speed limit in the center lane, I'd even say they cause more traffic problems than left lane hogs do. In fact, a lot of the "slower" drivers people complain about in the left lane are only there because of some slowpoke in the middle lane who is, by law, supposed to be all the way to the right, but is not. Why are they allowed to get away with this behavior?