基于无线传感网络的单点自组织信号控制方法

Method of Traffic Self-organizing Signal Control for Isolated Intersection Based on Wireless Sensor Network

为了解决传统环形感应线圈采集交通数据相对有限,已有交通信号配时方法不利于疏导拥挤交通流的问题,以无线传感网络采集到的交通数据为基础,提出了一种实时获知各股车流请求绿灯通行权急迫程度的计算方法,确定下一次发放绿灯通行权时应优先放行的车流;以拥挤流向放行车辆数最大为目标,从设计的候选车流组合集合中选择即将优先放行的车流所在的车流组合,根据设计的基于无线传感网络的自组织交通信号控制方法,为选择的车流组合分配绿灯时间;最后利用VISSIM软件对上述方法进行了仿真测试。结果表明:提出的方法改变了常规的控制模式,对快速疏导拥挤方向的车流较为有效。

In order to solve the problem of lack of dynamic traffic data collected by traditional loop sensing coil and the difficulty of evacuating traffic congestion by traditional traffic signal timing method,based on traffic data collected by wireless sensor network,a method of calculating the urgent degree for requesting green light which determined vehicle flows of priority was presented.For maximizing the numbers of passing vehicles,an available traffic self-organizing signal control method based on wireless sensor network was proposed,which could select different vehicle flows without conflict from vehicle flow collection and allocated green light time.Finally,the method was tested and compared through a simulated test with VISSIM software.Result shows that the proposed method which changes ordinary signal control mode can effectively evacuate the traffic flow of a congested intersection.