Microscopic Analysis of Airport Surface Sequencing

In this study we analyzed a limited set of airport surface surveillance data in which flights have been sequenced on the airport surface at intersections between taxiways to attempt to empirically derive operational techniques and factors influencing sequencing decisions. We refer to such analysis as ‘Microscopic Analysis’ of airport surface sequencing. While controller techniques may vary, initial results suggest that consistent sequencing patterns can be identified. Further, the results indicate that sequencing decisions are dependent on the flight status (in motion vs. stopped) and taxiway location. Our results indicate that almost 90% of flights that are established on a major taxi route are handled in a First-Come-First-Served order, whereas only 50% of flights merging onto the taxiway from the ramp area are handled in this order. These initial results, and the analysis techniques that have been developed through this study, provide the means by which airport surface decision support tools and airport surface models can be improved to accurately represent microscopic decisions on the airport surface that can have significant effects on the flow of the overall air transportation system.