Modeling and evaluation of adaptive bus-preemption control with and without AVL systems

To explore the advantage of integrating bus-preemption with adaptive signal control, this study has produced two integrated models for adaptive bus-preemption control in the absence and presence of automatic vehicle location (AVL) systems. Instead of using prespecified strategies (such as phase extension, phase early start and/or special bus phase) the proposed models make a preemption decision based on a performance index which includes vehicle delay, bus schedule delay, and passenger delay. This study also contains an extensive simulation evaluation with respect to the integration of adaptive control with bus-preemption. Under both with and without AVL environments, both developed models yield quite promising results.