Issues in Commuting and Pilot FatigueIssues in Commuting and Pilot Fatigue The potential for fatigue to negatively affect human performance is well established. Concern about this potential in the aviation context extends back decades, with both airlines and pilots agreeing that fatigue is a safety concern. A more recent consideration is whether and how pilot commuting, conducted in a pilot's off duty time, may affect fatigue. The National Academy of Sciences was asked to review