A development of deterministic signal control system in urban road networks

This paper studies a development of deterministic signal control system in urban road networks from the viewpoint of a digital control. The signal control system of the congestion length is described by a nonlinear time-varying discrete dynamic system and synthesized by using the feedback control based on the volume balance at each signalized intersection. The balance control algorithm and network control algorithm in which the three signal control parameters consisting of the cycle length, green split and offset are searched systematically so as to minimize the sum of congestion lengths at signalized intersections are presented. The configuration and development procedure of the deterministic signal control system are presented based on our studies. From the comparison of congestion lengths and signal control parameters between measurement values and simulation values, it is confirmed that the signal control systems and the signal control algorithms work effectively to minimize the congestion lengths at signalized intersections.