Traffic in the air above Kelly Field, a serious problem with 224 army air corps students making frequent training flights, has been safer since the “Trafficgram” went up on the wall at headquarters. It is a five-foot square aerial map of Kelly Field on which restricted and danger areas are marked. Pivoting about the mid-point of the airport is a glass disk on which are printed the rectangular courses the students must fly. Before taking off on a flight, the pilot turns the disk so that its index matches the wind direction, then reads on the map the exact traffic pattern, takeoff and landing lanes he must use.