【作者】 李悦；

【导师】 申金升；

【作者基本信息】 北京交通大学 ， 系统工程， 2007， 硕士

【摘要】 随着社会经济的发展，城市机动车拥有量不断增加，而城市道路的建设却不能跟上机动车的发展速度，因此交通拥堵、交通事故、环境污染和能源短缺等相关交通问题成为世界各国所面临的共同难题。采用现代科学技术的智能交通系统日益得到世界各国的高度重视，其中交通诱导系统是智能交通的一个重要组成部分，可以很大程度提升城市道路交通效率。可变信息标志VMS(Variable Message Signs)是交通诱导系统中实现公众信息服务的重要工具和手段。目前我国的大中城市的主干路网中都安装了可变信息标志系统，对于缓解交通拥堵问题起到了一定的作用，但是对于可变信息标志的安装位置的选择大多都依靠交通管理者主观上的判断和决定来做出的，对于安装位置的正确性和合理性没有更多的理论依据作为支持。所以如何选择科学合理的VMS安装位置，使其更加充分地发挥诱导作用是目前需要解决的课题。对此本文通过提出两个针对VMS选址的目标评价模型，旨在通过不同的效益评价目标对VMS的安装位置进行科学合理的选择。随后本文以一个简化的路网为研究对象，采用贪婪选址算法，通过对路网的仿真，得出了路网上的VMS的合理安装位置。最后，本文针对交通诱导系统中存在的对基础信息加工不深入，交通诱导系统建设的不完善的问题，提出了自己的设计方案，对交通诱导系统的信息采集、处理和发布等数据流程进行了分析，并据此对其软件系统模块进行了设计。更多还原

【Abstract】 With the development of the national economy, the number of vehicles keeps increasing. However, the construction of urban roads failed to keep up with the development of vehicles, so problems such as traffic jam, environmental pollution, energy shortage etc. have become global difficulties. Under such circumstance, the application of intelligent transportation systems has drawn attention globally. Urban traffic flow guidance system, which is a vital part of the intelligent transportation systems is able to greatly improve communication efficiency for urban roads, and the Variable Message Signs (VMS) is an important tool in VMS to materialize public information service.Currently, VMS is installed in the trunk road networks in China’s main cities, and played a positive role is easing traffic jams. However, the decision of where to rightly install VMS on the trunk road networks was made on subjective judgment, rather than on rational, theoretic guidance. Thus the question of how to find the right position to install VMS so as to give full play to its guidance effect needs to be answered. This thesis has put forward two evaluation models for the selection of VMS installation position, so as to make rational and right decisions on the selection of VMS installation position, according to different evaluation goals. Later, a simplified road network was chosen as the object of study, and the right installation position of VMS on it was figured out through greedy allocation arithmetic and road network simulation.At last, considering the fact that the basic information proceeding of urban traffic flow guidance system remains immature, and the system construction of urban traffic flow guidance system is imperfect, this study proposed new designs in these aspects, analyzed data procedures of urban traffic flow guidance system such as information collection, handling and output, and based on which, designed its system models.更多还原