文章基本信息

标题：Calibrating and Modeling Expressway with Different Ramp Distances on Beijing 3 rd Ring Road
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作者：Xiao-mei Zhao ; Xiao-mei Zhao ; Dong-fan Xie 等
期刊名称：Procedia - Social and Behavioral Sciences
印刷版ISSN：1877-0428
出版年度：2014
卷号：138
页码：37-44
DOI：10.1016/j.sbspro.2014.07.179
语种：English
出版社：Elsevier
摘要：AbstractAs a typical bottleneck connecting freeway and common road, ramp is an important traffic congestion area. Various traffic phenomena near ramps can be described by the Cell Transmission Model (CTM). However, real traffic data shows that traffic flow characteristics are far different for the ramp system with different ramp distances. We analyze traffic characteristics of ramp system with both an on-ramp and an off-ramp in Beijing 3rdring road firstly. Then, it is found that ramp distance between the on- ramp and the off-ramp has a great impact on the capacity, due to the conflict of traffic flow between on-ramp and off-ramp. Finally the traffic conflict is considered in the merge cell and Capacity Drop CTM (CD-CTM) is proposed to embody the conflict. The simulation results suggest that CD-CTM fits the empirical data from Beijing 3rdring road.
关键词：urban traffic flow;cell transmission model;ramp system;urban expressway