There are no cars on Caye Caulker, a small island off the coast of Belize. Everyone gets around by bicycle or foot. If you need a cab, then a golf cart will pick you up. The roads are sand. The motto of the island is Go Slow. If for some reason the golf carts are going too fast there are speed bumps. And how do you make a speed bump in a sand road? Bury a rope halfway in the sand.