FIGURE E-4 Impact of traffic growth on scheduling predictability at a major U.S. airport in visual meteorological conditions, based on a comparison of scheduled arrival times versus computed arrival times for 1997 (real data) and 2010 (projected data, assuming traffic increases 2.3 percent per year). The large delays occurring in 2010 are not caused by this airport’s planned schedule. The planned arrival rate never exceeds the airport’s acceptance rate, and more planes are not scheduled to arrive at the end of the day than at other times during the day. Delays primarily reflect the accumulated effect of delays at other airports, which result in late arrivals.

FIGURE E-5 Economic losses caused by undercapacity at U.S. airports, assuming that improvements to the air transportation system occur as scheduled.

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