U-Turns in Seoul

You can make U-turns in Seoul at any time from the middle lane; here’s a photograph that shows this quite clearly. And here’s a larger version, which shows it even more obviously. The Wikipedia article about U-turns contains some insight into the rules regulating these turns in some areas of the world.
Also, this photographer took a picture of the same place, but this time made it look like a postcard from the 1950’s. It’s a nice effect.