摘要
首先是基于理论的假设和猜测,对于固定的路段的"自由流车速"进行了稳定性分析和验证;然后依靠这一具有稳定性的交通参数,采用阈值限定和聚类的方法对疑似问题检测线圈进行了排查,并结合常理初步制定了判断规则;再通过多次实验对判定规则进行了检验和调整;最后对实验结果进行了分析,得到了可靠的判定依据。实验结果表明,在海量交通数据积存的基础上,利用该方法对可能有问题的检测设备进行甄别具有可行性和科学性。
Theory hypothesis is the premise of this paper. ＂Free Flow Speed＂ is a stable value in a fixed section of a highway has been analyzed and validated under the theory hypothesis and statistics. This result can help us move forward to screening questionable loop detectors which have some problem with them and product distorted data/Upto now, there＇ s no way to find out this kind of problem yet. Threshold values and clustering approaches are used in this paper to exclude and select questionable loop detrctors depending on the stable traffic parameter. And initial criterions come into being with the help of approaches and common practice. And then several necessary experiments are successfully implemented to＇validate and adjust the initial criterions. At last, the reliable determinant criterion was ascertained after analyzing the results of experiments. The result of the experiments shows that this method is feasible and proper in screening loop detectors with problems based on mass archived traffic data.
出处
《公路工程》
2009年第1期38-41,45,共5页
Highway Engineering
基金
上海市科委资助项目(06dzl2001)
