Airport Surface Hold Advisor for Conflict Resolution
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Solution Overview
Problem
Current airport surface traffic management systems face challenges in preventing gridlock and resolving merging and crossing conflicts among vehicles, as they rely on manual decision-making by air traffic controllers, which can lead to delays and inefficiencies, especially during busy periods and route transitions.
Innovation Solution
A method and system that identify potential conflicts by analyzing vehicle paths and designating critical sections on the airport surface, defining protected zones, and generating hold advisories to prevent gridlock and conflicts by determining optimal hold positions for vehicles, using a computer-based system to provide real-time guidance to traffic controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If automated conflict resolution systems are implemented, then conflict resolution time is reduced, but system complexity increases
Solution Approach 1:
The system segments the airport surface into discrete taxiway segments and identifies specific conflict types (crossing conflicts, merging conflicts, gridlock) at different locations. By dividing the complex traffic management problem into manageable segments and conflict categories, the system can apply targeted resolution strategies without requiring complete system redesign.
Solution Approach 2:
The system performs preliminary identification of potential conflicts by analyzing assigned paths and detecting crossing conflicts, merging conflicts, and gridlock conditions before they manifest as actual problems. Hold instructions are generated in advance to prevent conflicts rather than resolving them after occurrence, reducing overall conflict resolution time.
2Reliability
If hold instructions are generated for all potential conflicts, then conflict prevention is improved, but aircraft throughput decreases
Solution Approach 1:
The system applies different conflict resolution strategies based on the specific type and location of conflict. Crossing conflicts at intersections receive hold instructions, while merging conflicts may be resolved through path adjustments. Gridlock situations trigger coordinated hold instructions across multiple vehicles. This localized, differentiated approach prevents unnecessary holds while maintaining conflict prevention.
Solution Approach 2:
The system generates hold instructions selectively for identified conflicts rather than applying universal holds to all vehicles. By taking partial action only where conflicts are detected (crossing conflicts, merging conflicts, gridlock conditions), the system maintains adequate aircraft throughput while still preventing conflicts where they would occur.
3Measurement precision
If real-time path analysis is performed for all vehicles, then conflict detection accuracy is improved, but computational load increases
Solution Approach 1:
The system merges the path analysis process by simultaneously evaluating multiple vehicles' assigned paths to identify crossing conflicts, merging conflicts, and gridlock conditions in a unified analysis framework. This combined approach detects conflicts more accurately than individual vehicle analysis while optimizing computational efficiency through shared processing.
Solution Approach 2:
The system uses simplified representations of vehicle paths and airport surface geometry to perform conflict detection analysis. By working with path data structures and segment definitions rather than continuous physical models, the system achieves adequate conflict detection accuracy with reduced computational load suitable for real-time operation.
Data Source
AI summary
The Surface Hold Advisor Using Critical Sections is a system and method for providing hold advisories to surface controllers to prevent gridlock and resolve crossing and merging conflicts among vehicles traversing a vertex-edge graph representing a surface traffic network on an airport surface. The Advisor performs pair-wise comparisons of current position and projected path of each vehicle with other surface vehicles to detect conflicts, determine critical sections, and provide hold advisories to traffic controllers recommending vehicles stop at entry points to protected zones around identified critical sections. A critical section defines a segment of the vertex-edge graph where vehicles are in crossing or merging or opposite direction gridlock contention. The Advisor detects critical sections without reference to scheduled, projected or required times along assigned vehicle paths, and generates hold advisories to prevent conflicts without requiring network path direction-of-movement rules and without requiring rerouting, rescheduling or other network optimization solutions.