【摘要】 随着智能交通技术的发展,可变信息标志(VMS)被广泛应用于动态交通管理中.元胞传输模型(CTM)可以较好地模拟交通流激波、排队形成与消散等交通流动力学特性.应用CTM对VMS选址问题进行了研究.数值模拟结果表明,合适的VMS位置可以减少系统内所有车辆的行驶时间.还分析了路径选择概率变化与VMS位置之间的关系.在一定范围内,交通事故越严重,VMS应设置在距离事故地点越远的地方.更多还原

【Abstract】 With the development of intelligent transportation technologies,the variable message signs(VMS)have been widely used in guiding and managing the dynamic traffic.It is known that cell transmission model(CTM)can well reproduce such traffic dynamics as shock waves and jams.This paper employs the CTM to study the location problem of VMS.Simulation results show that there exists an optimal VMS location to minimize the total travel time of the traffic system.How changes of route choice probabilities before and after a traffic accident affect the optimal VMS locations is also investigated and it is concluded that the VMS should be placed far from the accident site if the anticipated accident is very serious.更多还原