Table 1-58:  FAA-Cited Causes of Departure and Enroute Delays,,,,,,,,,,,,,,
(After pushing back from the gate),,,,,,,,,,,,,,
,1987,1988,1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,a2000
Operations delayed (thousands),356,338,394,393,298,281,276,248,237,272,245,306,374,450
,,,,,,,,,,,,,,
Cause (%),,,,,,,,,,,,,,
Weather,67,70,57,56,65,65,72,75,72,R74,68,74,R69,69
Airport terminal volume,11,9,29,35,27,27,22,19,18,18,22,15,R12,14
ARTCC volume,13,12,8,2,b,b,b,b,b,b,b,b,b,b
Closed runways/taxiways,4,5,3,3,3,3,3,2,3,3,3,3,R5,6
NAS equipment,4,3,2,1,2,2,2,2,3,2,3,2,2,2
Other,1,1,1,4,3,3,2,2,4,2,4,6,R13,9
KEY:  ARTCC = Air Route Traffic Control Center; NAS = National Airspace System; R = Revised.,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
a Data is preliminary and subject to change.,,,,,,,,,,,,,,
b Delays due to ARTCC volume are included in delays due to terminal volume from 1991.,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
NOTE:  Percentages may not add to 100 due to rounding. ,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
"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 www.faa.gov/apa/Delays/atDelays.htm as of Oct. 8, 2001. ",,,,,,,,,,,,,,

, ,,,,,,,,,,,,,