Fuzzy controller for intersection group

This paper presents a fuzzy traffic controller for a set of intersections and its simulation results. In the developed system, each intersection has its own traffic controller. The controller of a intersection manages the phase sequence and the phase length dynamically according to its own and the neighboring traffic situations. To do this, we adopt a competitive scheme. All possible phases except the green phase compete to get the green signal. The controller consists of three modules: the next phase selection module, the green phase observing module, and the decision module. To carry out the performance evaluation of the controller, a simulator for the intersection group has been developed. The developed fuzzy traffic controller is compared with the vehicle-adjusted methods. The controller shows good performance in case where traffic patterns change over time and in heavy traffic situations.