Bus Signal Priority Strategy for Isolated Intersection with Farside Bus Stop

Abstract:

A model to calculate bus delay at intersection with farside bus stop was first built,then a new bus signal priority control strategy was proposed.The system composed by intersection and farside bus stop was adopted as control object. A multiobjective model, composed by minimization schedule deviation and minimization average delay of other motor vehicles,was built.Two kinds of buses, “early bus” and “late bus” were considered in the optimization process of the model. Constrains including phase length, queue length, strategy adaptability and degree of saturation of every movements were also considered in the model.The results of a case study show that the efficiency of bus signal priority is affected evidently by the queue at farside bus stop. It may lead to a larger bus schedule deviation and priority invalidation if the queue at farside bus stop and bus status are neglected in the signal optimization process.With the proposed model,the above problems can be solved and the paretooptimal solution can be obtained.