基于流量状态的路段交通信息检测器布设点优化

Traffic Information Detector Distribution Optimum of a Road Section Based on Traffic Flow

为了提高交通信息检测器的采集精度,需在路段确定为最优路段后寻找检测器的最优布设位置。利用路段分段后每段的断面平均速度与路段平均行程速度建立检测器契合度模型,考虑流量波动对检测器的影响,通过计入路段上不同流量状态下的最佳契合度,确定检测器的最佳布设位置点。经过实例验证,不同路段的最佳布设检测器的位置点不同,要根据实际情况进行度量。本文可为找出交通信息检测器的最优布设方案提供定量计算的方法,具有一定的实践性与有效性。

To improve the precision of traffic information collected by detectors, the optimal position on a road should be sought after determining the priority roads. By applying the average speed of each road section and the average overall speed, a matched-degree model was established. Considering the influence of flow fluctuation to the detectors, the optimal positions on the road could be sought by comparing all the optimal matched degrees under＂ different traffic flows. It was illustrated by an example that the location of the optimal position in each road section should be measured according to the actual situation. Then the practicality and effectiveness of the quantitative calculation method for the optimal detector distribution in this article was verified.