Air Traffic Control Specialists (ATCSs) are responsible for the safe, efficient, and orderly flow of traffic in the U.S. National Airspace System. Color has become an integral element of the air traffic control environment. It is used to communicate information to ATCSs about various modes of air traffic functions including conflict alerts, aircraft control status, and weather. The Federal Air Surgeon (AAM-1) and Human Factors Research, Engineering, and Development office ...