A controller tool for transition airspace

This paper describes simulation and field test evaluation of an integrated decision support tool for trial planning and arrival metering in transition airspace, i.e., en route airspace near the terminal area. The challenge for this tool will be to solve tactical arrival-metering problems. The tool calculates fuelefficient descent trajectories, arrival sequencing and metering, and includes a trial-planning function for conflict resolution. Simulation evaluations were conducted at NASA Ames in April and July of 1998 and field-test evaluation was conducted at Fort Worth Center in November 1998. Results indicate the trialplaMing function provided benefits for strategic conflict resolution but controllers preferred not to use it in the more tactical arrival-metering environment. Controllers often used the trial planner to determine if a direct route to a downstream fix along the aircraft’s route of flight was feasible. The test also confirmed the high controller acceptance of the trial-planning capability.