| Popis: |
*† ‡ Improving airfield design is one strategy that can be used to reduce aircraft emissions at airports. At high-traffic airports with parallel runways, end-around taxiways can reduce runway incursions as well as increase runway throughput. This study evaluates the environmental implications of these taxiways at a candidate airport, DFW (Dallas/FortWorth International Airport). The use of the end-around taxiway varies significantly on a daily basis. Since operations on the taxiway do not follow strict procedures, there is potential to develop procedures for the effective use of the end-around taxiway, in terms of taxi time and surface fuel burn reduction. While the end-around taxiway shows significant promise in terms of fuel burn and emissions reduction, these benefits depend on the manner of operation of the taxiway. Factors such as traffic conditions on adjacent runways, traffic flow direction, arrival time of aircraft, and the specific aircraft type play a major role in extracting environmental benefits from end-around taxiways. For example, the results show that the average fuel burn for aircraft using the end-around taxiway is less than the average fuel burn of aircraft using a conventional taxiway during a select portion of the day, specifically, between 5pm and 1am. Further, implementation of decision rules based on the results of this research show promise in terms of fuel burn reduction. |
