基于车辆检测器的可变情报板诱导效果评价

Evaluation of variable message signs information service based on vehicle detector

通过智能交通系统中的车辆检测器比较准确地检测了交通量数据,并在此基础上提出了一种采用实地试验方法对可变情报板的诱导效果进行评价的方法。该方法通过对分流匝道处的车辆检测器交通量历史数据进行清洗融合,得到不受可变情报板影响的历史数据,再将得到的历史数据通过诱导前的交通流数据校正后形成基准数据,然后和可变情报板作用后的交通流分流比例进行对比,最后针对对比的结果给出调整方法,从而获得了更好的诱导效果。

Vehicle detector for intelligent transportation system can accurately detect traffic data. Based on this, evaluation of variable message signs （VMS） information service is given based on field test method. The historical data that are not affected by VMS are obtained through cleansing and fusion of traffic flow data detected by the vehicle detector at the shunt ramp. Reference data are got using data reconciliation of traffic flow data not processed by VMS. The comparision of traffic flow data issued by VMS with reference data illustrates the difference between two sets of data and the effects of VMS, through which the VMS parameters are adjusted to get better effects of VMS.