Q-Turn?

I see occasionally very unusual road diagram signs here in Seoul. For example, some interchanges (IC in Konglish) are notoriously complicated. The diagram of one of these ICs looks like something from an advanced organic chemistry book. And I've never have my camera handy. But the other day CH and I were driving to a meeting, and we came to this stop light. I was able to whip out the camera in time to snap this photo. It's not one of the complicated IC diagrams, but it is interesting. You've heard of "U" turns of course, and probably you know "P" turns. What on earth is this one? I named it a "Q" turn (fortunately we were only turning left and didn't have to follow this crazy path):



Briefly, U turns of course turn you around so you're going in the opposite direction. In Seoul, sometimes at a busy intersection that has cloverleafs, and you can't turn left directly. Instead you cross through the intersection in the right-hand lane, then turn right immediately on the cloverleaf. With this manoeuver, called the "P" turn, you end up effectively making a left turn.