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http://dx.doi.org/10.12815/kits.2017.16.3.110

A Passive Traffic Signal Priority Control Algorithm for Emergency Vehicles  

Lee, Jongwoo (Dept. of Environmental Planning, Graduate School of Environmental Studies, Seoul National University)
Lee, Soong-bong (Dept. of Environmental Planning, Graduate School of Environmental Studies, Seoul National University)
Lee, Jinsoo (Dept. of Environmental Planning, Graduate School of Environmental Studies, Seoul National University)
Um, Ki Hun (Dept. of Environmental Planning, Graduate School of Environmental Studies, Seoul National University)
Lee, Young-Ihn (Dept. of Environmental Planning, Graduate School of Environmental Studies, Seoul National University)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.16, no.3, 2017 , pp. 110-119 More about this Journal
Abstract
This study develops a passive traffic signal priority control algorithm for emergency vehicles. The passive priority control estimates and applies signal times for each signalized intersection on the emergency vehicle's route when an emergency call is received. As signals are controlled before the emergency vehicle leaves for its destination, it is possible to clear the queues at each intersection more effectively. Most of the previous studies applied preemption, which ends green time of cross streets when the emergency vehicle arrives at each intersection. This study applies green extension and early green in order not to shift the order of phases, and guarantees minimum green time for each phase. Simulation results show that the delay of emergency vehicles decreases when the signals are controlled. It is expected that delays can be decreased further by integrating the active priority control with the passive priority control algorithm presented in this study.
Keywords
Emergency Vehicle Priority Signal System; Passive Signal Control; Early Green; Green Extension; Minimum Green Time;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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