TroTro: Transport for the People by the People

Say you want to go somewhere along the route to "Circle" (Accra's central bus station). You stand at the side of the road and make a circle in the air with your finger. You wait until you see a tro-tro operator (or "mate") making a similar sign out the window, yelling "circle, circle, circle" to indicate its direction. He sees you. The tro-tro stops. You get on. And away you go. A simple system once you understand. Maddening if you don't.