Table 1-61:  FAA-Cited Causes of Departure and En route Delays (After pushing back from the gate),,,,,,,,,,,,,,,,
,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999, 2000, 2001,2002,2003,,
Operations delayed (thousands),393,298,281,276,248,237,272,245,306,374,450,348,286,317,,
Cause (percent),,,,,,,,,,,,,,,,
Weather,56,65,65,72,75,72,74,68,74,69,69,72,72,72,,
Airport terminal volume,33,26,25,21,18,17,17,20,13,8,11,9,9,7,,
Air Route Traffic Control Center volume,2,1,2,1,1,1,2,2,2,4,3,3,5,4,,
Closed runways / taxiways,3,3,3,3,2,3,3,3,3,5,6,5,4,7,,
National Airspace System equipment,1,2,2,2,2,3,2,3,2,2,2,2,1,1,,
Other,4,3,3,2,2,4,2,4,6,13,9,10,9,9,,
KEY:  FAA = Federal Aviation Administration.,,,,,,,,,,,,,,,,
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NOTE,,,,,,,,,,,,,,,,
Numbers may not add to totals due to roundings.,,,,,,,,,,,,,,,,
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SOURCES,,,,,,,,,,,,,,,,
"1987-97: U.S. Department of Transportation, Federal Aviation Administration, Aviation Capacity Enhancement Plan (Washington, DC: Annual issues). ",,,,,,,,,,
"1998-2000: U.S. Department of Transportation, Federal Aviation Administration, Internet site http://www.faa.gov/apa/Delays/atDelays.htm as of Aug. 8, 2002. ",,,,,,,,,,
"2001-02: Ibid., Internet site http://www2.faa.gov/index.cfm/apa/1319 as of July 21, 2003.",,,,,,,,,,
"2003: Ibid., Operations Network (OPSNET) database query, Internet site http://www.apo.data.faa.gov/ as of Oct. 15, 2004.",,,,,,,,,,