DISTRIBUTED SIGNAL CONTROL SYSTEM

摘要

Without deciding a range having a common cycle in advance, each signal controller is interlocked with signal controllers of the adjacent intersections and each cycle, split, and offset are automatically decided so as to be optimal. A distributed control system connects signal controllers (21 to 26) of the respective intersections (11 to 16) by a communication line so that information can be exchanged with signal controllers of the adjacent intersections. Each of the signal controllers measures a traffic flow amount of an incoming path leading to its intersection and calculates the least cycle and split required for its intersection according to the measured amount. By exchanging information with the adjacent intersections via the communication line, it is decided whether to match the cycle or not according to a predetermined evaluation function. When the cycle is to be matched, an optimal offset is also calculated. The cycle, split, and offset are target values and after transferring to the target values, the split and offset can be adjusted/modified within a predetermined range according to the current traffic condition.