In America, we see men, standing in the middle of busy construction zones directing traffic. Here in Korea, they are smart. They have mannequins directing traffic.
In American, we see men and women, on the side of highways directing traffic with signs next to them that say, Drive slow, my Dad works here. In Korea, they are smart, they have men made out of billboards that light up that say, drive slow.
Much safer, more efficient and cheaper.