城市轨道交通站外导向标志在道路交叉口的布局优化

Layout Optimization of Traffic Guide Signs Near Urban Rail Transit Station at Road Intersections

针对城市轨道交通站外导向标志布局指导方法不完善的现状,考虑道路交叉口通达性、承载能力及周边客流量三方面因素,运用层次分析法对不同道路交叉口设置站外导向标志的效用进行评价。结合城市轨道交通车站周边道路交叉口实际情况,制定了站外导向标志布局原则,以车站客流吸引范围内各道路交叉口设置站外导向标志的总效用值最大为优化目标,构建站外导向标志点位选择模型,并采用运筹学软件LINGO中内置的分支定界算法求解。最后以成都地铁羊犀立交站为例,证实了模型的适用性和方法的可行性。

Currently there is a lack of guideline for the placement of traffic guide signs near urban rail transit stations. The paper applies an analytic hierarchy process to evaluate the effectiveness of traffic guide signs near urban rail transit stations at road intersections. The intersection accessibility, carrying capacity, and surrounding passenger flow are considered in the evaluation process. The traffic guide signs distribution problem is then formulated as a facility location problem and solved by the branch and bound method using commercial solver LINGO. The model is verified using a real world example at the Yangxi flyover station of Chengdu Metro.