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Full-Text Articles in Engineering
Modeling Air Traffic Situation Complexity With A Dynamic Weighted Network Approach, Hongyong Wang, Ziqi Song, Ruiying Wen
Modeling Air Traffic Situation Complexity With A Dynamic Weighted Network Approach, Hongyong Wang, Ziqi Song, Ruiying Wen
Civil and Environmental Engineering Faculty Publications
In order to address the flight delays and risks associated with the forecasted increase in air traffic, there is a need to increase the capacity of air traffic management systems. This should be based on objective measurements of traffic situation complexity. In current air traffic complexity research, no simple means is available to integrate airspace and traffic flow characteristics. In this paper, we propose a new approach for the measurement of air traffic situation complexity. This approach considers the effects of both airspace and traffic flow and objectively quantifies air traffic situation complexity. Considering the aircraft, waypoints, and airways as …
Time-Dependent Transportation Network Design Considering Construction Impact, Yi He, Ziqi Song, Lihui Zhang
Time-Dependent Transportation Network Design Considering Construction Impact, Yi He, Ziqi Song, Lihui Zhang
Civil and Environmental Engineering Faculty Publications
A traditional discrete network design problem (DNDP) always assumes transportation infrastructure projects to be one-time events and ignores travelers’ delays caused by construction work. In fact, infrastructure construction usually lasts for a long time, and the impact on traffic can be substantial. In this paper, we introduce time dimension into the traditional DNDP to explicitly consider the impact of road construction and adopt an overtime policy to add flexibility to construction duration. We address the problem of selecting road-widening projects in an urban network, determining the optimal link capacity, and designing the schedule of the selected projects simultaneously. A time-dependent …