The Optimal VMS Location Method in Urban Traffic Flow Guidance System

Variable Message Signs (VMS) are becoming popular as one of the primary means to issue the real-time traffic information in Urban Traffic Flow Guidance System. The VMS can exert their best affection only when they locate on the optimal location. But when we consider the best location of the VMS, we often depended on the feeling or the experience, and lack of scientific data. This paper discusses a new method to locate the VMS, based on analyzing the intersection important degree in traffic network and the guidance obey rate in the key intersection. Lastly, the method is applied in a simulation experiment in Changchun city. According to the analysis result, we can prove the method is effective.