So here's my theory: The carpool lane (or whoever is in that lane at the time) is like the devil. In the area where you're legally allowed to get over to the lane, the driver currently in the lane is driving faster than everyone, making it look like a MUCH better lane to be in! (The same way the devil makes unrighteous things look good) So we say, HEY!! GO TO THE CARPOOL LANE!! Then, when we get comfortably in the carpool lane, we notice the driver in front of us getting a little slower, but not much. But then when the double lines creep up on you, the driver basicly stops AND NOW YOU CAN'T GET OUT!!
So the Moral of the story: Think hard and wisely before making decisions in life, or else you'll be stuck in a place where you definitely DO NOT want to be.