基于无线地磁的交叉口信号控制策略研究

Wireless Sensors-based Intersection Signal Control Strategy

感应控制主要是利用无线地磁检测器采集道路交叉口实时交通信息,及时传递给交通控制系统,结合感应控制自动实施控制的原理,确定城市道路交叉口智能控制方案,根据交叉口交通量实际状况进行合理配时;文章对合肥市黄山路-天智路交叉口的固定信号周期测得的周期、相位时间、通过的车辆数及车辆平均等待的时间与感应控制条件下的各参数实际值作对比,分析各参数之间存在的差距,确定在车流量较少的情况下,感应控制优于常规的固定周期信号控制方法。

Wireless terrestrial magnetism detectors can be used to collect the real-time traffic volume data of the intersection.Then the collected data is transmitted to the traffic control system.Based on the actuated control principle,the signal control system utilizes the real-time traffic condition to develop the control strategy and optimize the signal timing.This control method is tested for one intersection in Hefei City,compared with the pretimed control method.Throughput and waiting time are used as the performance measurements.Comparative analysis shows that actuated control is better than pretimed control under the free-flow condition.