Adaptive traffic signal optimization considering emergency vehicle preemption and tram priority using PVS algorithm

Abstract

The tram has been known as a modern, environmentally friendly, quick and safe means of transportation; hence, giving the signal priority for trams on arterial streets at signalized intersections is crucial to improve tram service efficiency. However, tram priority can impact the movement of emergency vehicles (ambulances, police cars, fire engines, etc) which required quick response to save lives and properties. Therefore, to organize the traffic road, it is necessary to make the urban road network more efficient by considering both tram and emergency vehicles priority. In this paper we propose a new approach, a system that can adapt efficiently with a priority signal control. Thereof, we have used Transit Signal Priority (TSP) techniques to adjust signal phasing in order to serve emergency vehicles and manage the tram priority in a coordinated tram intersection. The system used in this study provides acyclic signal operation based on a real time control approach including: - An optimization process using passing vehicle search algorithm (PVS) to control the flow through the network. - A database to manage the sensor data from detectors for real time predictions of emergency vehicle and tram arrival time. - A traffic road simulation module to evaluate best timing plans at the intersection.