根据路网中路段间流量的相关性,提出了一种路网交通检测器优化布设方法.通过路径-路段发生矩阵得到关键路段数量,并分析了网络规模、网络连通性、OD对数量及路径数量对关键路段数的影响;综合考虑路径覆盖率、道路等级、道路长度以及配套设施等因素,建立了最优关键路段组选择的多目标优化模型;提出了通过线性组合由关键路段流量推算其他路段流量的方法.在典型Nguyen-Dupuis网络上的验证表明,该方法具有较强的实用价值.

Proposed in this paper is an optimal arrangement method of traffic flow detectors based on the correlation of link flow in the road network.In the investigation,first,the number of key links is determined by using the link-path incidence matrix and its dependence on the network scale,the network connectivity,the number of OD pairs and the path number is analyzed.Then,by taking into consideration such factors as path coverage,road grade,road length and road facilities,a multi-objective optimization model for the selection of key links is set up,and a method determining the non-key link flow through the linear combination of key link flow is proposed.Experimental results on Nguyen-Dupuis network show that the proposed method is of good practicability.