城市中心区干道变速双向绿波带

Bidirectional Change-speed Green Wave of the Urban Central Arteries

城市干道交通量的增长使人们对干道协调控制的要求提高,而传统的双向绿波带方法常遇到带宽过窄,带速过高等不利情况,难以应用到双向交通拥挤的城市干道。本文改变以往绿波带速不变的设定,提出一种变速的双向绿波带控制方法和与其对应的橡皮筋模型,可简便地求解双向绿波带各路段变化的交通流速度。在最小变速约束解的基础上,对该模型进行速度控制的功能性优化以提高行车和交通安全性,并以南京水西门大街为例,利用VISSIM仿真比较分析变速双向绿波的优势。

The growth of urban trunk traffic increases the demand for coordinated control of the main roads,and the traditional method of the bidirectional green wave is prone to make the width of wave too narrow and the speed too fast so that it is difficult to apply to the arteries with congestion of bidirectional traffic. In this paper,with the condition of constant velocity changed,the method of bidirectional change-speed green wave and corresponding rubber band model were proposed,which can easily get the values of changing traffic flow velocity on each section of bidirectional green wave. On the basis of the constrained solution of minimum changes in speed,the model was optimized in functionality of speed control to improve the safety in driving and traffic. VISSIM was used to simulate Nanjing Shuiximen Street to compare and analyze the advantage of the bidirectional change-speed green wave.