城市可变信息标识选址算法  

Locating algorithm of urban variable message signs

作　　者：四兵锋[1] 陈伯阳[1] 蒋明清[1] 杨小宝[1] 

机构地区：[1]北京交通大学城市交通复杂系统理论与技术教育部重点实验室,北京100044

出　　处：《交通运输工程学报》2015年第6期110-117,共8页Journal of Traffic and Transportation Engineering

基　　金：国家973计划项目(2012CB725400);国家自然科学基金项目(71571013;71210001)

摘　　要：考虑了道路等级、交通流量与道路运行状态等静态因素,以及信息叠加特征的动态因素;提出了一种考虑路段属性的城市可变信息标识(VMS)选址算法,运用回溯法的思想,针对与交通诱导密切相关的4个主要路段属性,包括道路等级、交通流量、布设效果与信息叠加度,对路段进行多层次筛选;引入2个参数,分别为路段交通流量和布设效果的遍历范围,通过调整这2个参数,控制不同属性之间的重要程度;基于北京市某局部路网对算法进行了验证。验证结果表明:当这2个引入参数由0.3增大到0.6时,布设路段顺序会发生改变,等级较高的路段即使交通流量较小也会得到优先布设,处于同一交通流量区间的路段,布设效果大的路段优先布设;在实际应用中,如果要求VMS多布设在等级较高的路段上,可以通过调整算法参数而进行布设顺序的调整。Not only the static factors including road grade,traffic flow,and road operation state,but also the dynamic factor of information attenuation property were considered,a locating algorithm of urban variable message sign（VMS）considering the properties of road sections was proposed.In view of 4main road properties closely related to the traffic guidance,including road grade,traffic flow,layout effect,and information superposition,road sections were scanned in multi-level.The traversal ranges of traffic flow and layout effect of road section were introduced into the algorithm.The importance degrees of different properties were controlled by adjusting the two parameters.The algorithm was verified by using a local road network of Beijing City.Verification result shows that when the two parameters change from 0.3 to 0.6,the layout orders of different road sections change.The road sections with high grades have layout priority,even if the traffic flow is small.Based on the same interval of traffic flow,the roads with better layout effect are selected to locating VMS preferentially.In practice,if more VMSs are requested to layout on high-grade road sections,the layout order can be adjusted by adjusting the parameters.

关 键 词：可变信息标识 道路网络 回溯法 交通诱导 交通流量 交通等级 

分 类 号：U491[交通运输工程—交通运输规划与管理]