A Rule-Based Model for Integrated Operation of Bus Priority Signal Timings and Traveling Speed

This article presents a rule-based model for the integrated operation of bus priority signal timings and bus traveling speed. This strategy can be used at isolated intersections when real-time adjustment of bus speed is available (e.g., through Connected Vehicle). The authors define the bus-passing window and the bus-arriving window with respect to the real-time signal status and bus arrivals to capture explicitly the interaction between bus speed and transit priority signal timings. They develop a set of integrated operational rules on the basis of these windows for buses with and without schedule deviation. The goal of this project is to minimize bus schedule deviation, bus fuel consumption, and emissions. A VISSIM-based simulation platform was designed and used for simulating and evaluating the proposed method, which includes four subsets: impacts of preceding bus analysis rules, priority requests generation rules, priority passing rules, and speed adjustment without priority rules. The authors’ analyses demonstrate that their proposed rule-based integrated operational approach outperforms the no priority and conventional priority strategies (no bus speed adjustment) in terms of reducing bus delays, improving schedule adherence, saving energy, reducing emission, and minimizing the impacts on general traffic. The authors conclude by calling for additional studies in settings beyond the isolated intersection.


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  • Accession Number: 01492217
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 8 2013 3:21PM