位相モデルによる信号機広域制御ダイナミクスの提案

Abstract

This study proposes a coupled system of phase oscillators for a single control of an urban traffic network. An area-wide control is given by a network of autonomous systems, which exchange local information without any central monitoring system. Each signal is modeled by a simple phase oscillator with a periodic motion, and pair-wise interactions with the adjacent signals control its offset to attain a desired value. The interaction strength depends on a traffic flow density between the corresponding pair of adjacent signals. The proposed control method is applicable to a rather general traffic flow, including a loop road, a one-way road, left- or right-turn traffic at a intersection, and any number of roads at an intersection. The results of computer simulations on several traffic flow patterns and conditions in a system of 2*2 signals are shown both with a macro model described by a flow density and with a micro model considering the dynamics of an individual car. Statistics such as average travel time show that, in most cases, effective control is achieved adaptively by the proposed method.