Ground delay program

Article summary

An air traffic control ground delay program or FAA Flow Control is a traffic flow initiative that is instituted by the United States Federal Aviation Administration (FAA) in the National Airspace System. This program is usually instituted when the following events occur at an airport: *inclement weather (i.e., reduced visibility, thunderstorms, snow); *a large volume of aircraft going to an airport or en route to another airport in the same line of flight; *an aircraft incident, closed runways; or *a condition that requires increased spacing between aircraft, such as the Instrument Landing System (ILS) approaches vs. visual flight rules (VFR) approaches. The main factor for determining if a ground delay program is needed is a number called Airport Arrival Rate (AAR). This number is set by the controlling air traffic facility. When the AAR is reduced by the supporting ATC facility, the Air Traffic Control System Command Center (ATCSCC), in Warrenton, Virginia (Vint Hill Farms Station) institutes a Ground Delay Program. Ground delay programs (GDP) can affect various sections of the United States' airspace, as well as airports in Canada. That is because Nav Canada inherited the agreement between the FAA and Transport Canada that the Ground Delay Program would be implemented for departures from Canadian airports.…

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