Figure 2,,
FAA-Cited Causes of Departure and ,,
En Route Delays: 1999 ,,
(After pushing back from the gate),,

Weather,68%,
Flight volume,12%,
Closed runways,5%,
Equipment problems,2%,
Other,13%,

"SOURCE: U.S. Department of Transportation, Federal Aviation Administration, ",,
Operations Network (OPSNET) database.,,