| 动态输入下路段行程时间研究 |
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| 引用本文： | 祁宏生,王殿海.动态输入下路段行程时间研究[J].公路交通科技,2009,26(11). |
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| 作者姓名： | 祁宏生 王殿海 |
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| 作者单位： | 吉林大学,交通学院,吉林,长春,130025 |
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| 基金项目： | 国家重点基础研究发展计划(九七三计划)资助项目 |
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| 摘 要： | 以元胞传输模型(LWR模型的离散形式)作为分析工具,以行程时间为研究对象,研究了单车道路段没有出入口的基本路段受交通信号控制影响下的动态行程时间.考虑到路段上车辆密度对车辆速度的影响,文章定义了路段加权密度来表征车辆进入路段时路段的状态.分析结果表明,动态行程时间和车辆进入路段时的流量基本上没有关系;当车辆进入路段时刻一定时,路段加权密度和车辆的动态行程时间成线性关系.
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| 关 键 词： | 交通工程 行程时间 元胞传输模型 加权密度 |
Research on Link Travel Time under Dynamic Inflow |
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| QI Hongsheng,WANG Dianhai.Research on Link Travel Time under Dynamic Inflow[J].Journal of Highway and Transportation Research and Development,2009,26(11). |
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| Authors: | QI Hongsheng WANG Dianhai |
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| Abstract: | By using cell transmission model (CTM, discrete form of LWR model) as analyzing tool, the travel time of a one-way basic road link without entrance and exit controlled by traffic signal was studied.With consideration of the effect of vehicle density on travel speed in the road link, the weighted density of road link was defined to represent the road link state when vehicles enter into the road link.The analytic result shows that (1) dynamic travel time have nothing to do with traffic flow when vehicles enter into the road link; (2) weighted density of road link is in direct proportion to dynamic travel time when the time of vehicles enter into the road link is fixed. |
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| Keywords: | traffic engineering travel time cell transmission model weighted density |
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