Sensitivity analysis of key input parameters in conditional cell transmission model for oversaturated arterials

作     者：王屏 S.L.JONES 杨群 S.GURUPACKIAM 

作者机构：Key Laboratory of Road and Traffic Engineering of Ministry of Education(Tongji University) Department of CivilConstructionand Environmental EngineeringUniversity of Alabama 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2013年第20卷第6期

页      面：1772-1780页

核心收录：

学科分类：08[工学] 0823[工学-交通运输工程] 

基　　金：Project(51108343)supported by the National Natural Science Foundation of China Project(06121)supported by University of Transportation Center for Alabama,USA 

主　　题：oversaturation conditional cell transmission model sensitivity analysis delay possibility 

摘      要：A novel conditional cell transmission model （CCTM） is a potential simulation tool because it accommodates all traffic conditions from light condition to oversaturated condition. To test the performance of the CCTM, a series of experiments for sensitivity analysis were designed and performed for a multilane, two-way, three-signal sample network. Experiment 1 shows that the model is performed in a logical and expected manner with variations in traffic demand with time and direction. Experiment 2 shows when the possibility of the occurrence of a useful gap increases to 60% and 100%, the delays in left rams decrease by 5% and 15%, respectively. In Experiment 3, comparing the possibility of a conditional cell of 0 with 100%, delay of left turn and delay of the entire network were underestimated by 58% and 11%, respectively. Hence, sensitivity analysis demonstrates that by reflecting local drivers＇ behaviors properly, the CCTM provides an accurate representation of traffic flow in simulating oversaturated traffic conditions.