Jam Formation of Traffic Flow in Harbor Tunnel

作     者：何红弟 卢伟真 董力耘 

作者机构：Logistics Research Center & Shanghai Engineering Research Center of Shipping Logistics InformationShanghai Maritime University Department of Civil and Architectural EngineeringCity University of Hong Kong Shanghai Institute of Applied Mathematics and MechanicsShanghai University 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2011年第56卷第12期

页      面：1140-1144页

核心收录：

学科分类：08[工学] 082303[工学-交通运输规划与管理] 0704[理学-天文学] 082302[工学-交通信息工程及控制] 0702[理学-物理学] 0823[工学-交通运输工程] 

基　　金：Supported by Research Grants from City University of Hong Kong,HKSAR under Grant No.CityU-SRG 7002684 Science&Technology Program of Shanghai Maritime University under Grant No.20110046 Shanghai Municipal Natural Science Foundation under Grant No.10190502500 National Natural Science Foundation of China under Grant Nos.11172164,71101088 and 71171129 

主　　题：traffic jam critical densities harbor tunnel slope 

摘      要：This paper reports a study concerning occurrence and growth of traffic jam in a harbor tunnel. The single-lane with three sections （downgrade, fiat, and upgrade） is taken into account and they are characterized with different velocity limit. At the low density, the traffic current increases linearly with density and saturates at some values of immediately density. As the density increases, the traffic jam appears firstly before the upgrade section and then extends to the downgrade section. Additionally, the relationships of the velocity and headway against position in different densities are obta/ned from simulation. These results clearly clarify where and when the traffic jam appears. Finally, the critical densities are derived via the theoretical analysis before and after the discontinuous fronts and the theoretical results are consistent with the critical values of simulation results.