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信号交叉口短车道长度与配时参数优化模型

发表时间:2011-06-30  浏览量:1174  下载量:590
全部作者: 姚荣涵,王立冰
作者单位: 大连理工大学交通运输学院;大连理工大学网络教育学院
摘 要: 为提高交叉口通行能力且充分利用短车道,提出短车道长度与信号配时参数组合优化模型。为说明模型优化参数的有效性,设计了2种短车道渠化方案,并根据韦伯斯特模型计算了配时参数。以通行能力、平均延误和饱和度为指标评价了优化方案和设计方案。结果表明:短车道过短会降低其利用率,不能使交叉口通行能力达到最大;短车道过长能使其利用率达到1,但会使时空资源有所浪费;短车道只有按最佳长度渠化时才能使交叉口通行能力最大化且时空资源不浪费。
关 键 词: 交通运输规划与管理;短车道长度;饱和流率;信号配时;优化设计
Title: Model of optimizing lengths of short lanes and parameters of signal timing at signalized intersections
Author: YAO Ronghan, WANG Libing
Organization: School of Transportation and Logistics, Dalian University of Technology; School of Network Education, Dalian University of Technology
Abstract: To improve capacity of intersection and use short lane fully, the combined model of optimizing lengths of short lane and parameters of signal timing is developed. To explain the effectivity of the optimization model, the two channelization schemes of short lane are given and the parameters of signal timing are calculated by the Webster model. The optimized scheme and the designed schemes are evaluated by the indexes of capacity, average delay and saturation. The results indicate that the utility of short lane descends and the capacity of intersection does not reach maximum when short lane is too short; and the time�space resources of intersection will be wasted though the utility of short lane is equal to 1 when short lane is too long; the capacity is maximum and the time�space resources is not wasted when the length of short lane is optimal.
Key words: traffic and transportation planning and management; length of short lane; saturation flow rate; signal timing; optimizing design
发表期数: 2011年6月第12期
引用格式: 姚荣涵,王立冰. 信号交叉口短车道长度与配时参数优化模型[J]. 中国科技论文在线精品论文,2011,4(12):1076-1083.
 
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