| One of the greatest challenges facing the aviation industry today is the continued growth of traffic, often overwhelming the air traffic control (ATC) system at the busiest airports, especially during periods of inclement weather. One concept under consideration to accommodate this growth is a more flexible ATC system, known as free flight, which would allow user-preferred routing and limited pilot self-separation.; This thesis considers the difference in risk perception reported by pilots and air traffic controllers in the existing ATC system, and under a simulated free flight environment. No significant differences in risk ratings were found for Role or ATC Environment, although significant differences were found when the varying traffic situations were considered. In addition, pilots and controllers indicated that they prefer to use different types of maneuvers to avoid traffic conflicts. This information will aid in the development of new policies and procedures in the evolving air traffic management system. |
