| 基于车头间距变量的通行能力理论模型 |
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| 引用本文： | 臧晓冬,周伟.基于车头间距变量的通行能力理论模型[J].公路交通科技,2010,27(2). |
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| 作者姓名： | 臧晓冬 周伟 |
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| 作者单位： | 1. 北京工业大学,交通工程北京市重点实验室,北京,100022;广州大学,土木学院,广东,广州,510006
2. 交通运输部公路科学研究院,北京,100088 |
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| 基金项目： | 国家科技支撑计划资助项目(2006038096023);;建设部科技资助项目(2008-K5-6) |
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| 摘 要： | 从车头间距构成的理论分析入手,考虑了跟驰时间变量和车速随机分布的特性,建立了跟驰时间模型和车头间距随机项模型,进而建立了改进的车头间距模型,在此基础上建立了改进的通行能力模型,以《HCM2000》中的高速公路临界速度数据作为评定标准标定模型的参数,并计算确定理论通行能力值,该值与《HCM2000》中的通行能力值相差很小,证明该模型能够拟和实际的道路交通流情况,同时分析了最大跟驰时间和速度均方差对通行能力的影响,最后采用城市主干道的调查数据对模型进行了标定和验证,验证结果表明,该模型经过标定后可以拟和城市道路的交通流状况,进一步说明了模型的实用性。
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| 关 键 词： | 交通工程 理论模型 车头间距 通行能力 |
Theoretic Capacity Model Based on Variable Space Headway |
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| ZANG Xiaodong,ZHOU Wei.Theoretic Capacity Model Based on Variable Space Headway[J].Journal of Highway and Transportation Research and Development,2010,27(2). |
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| Authors: | ZANG Xiaodong ZHOU Wei |
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| Institution: | 1.Beijing Key Lab of Traffic Engineering;Beijing University of Technology;Beijing 100022;China;2.Research Institute of Highway;Ministry of Transport;Beijing 100088;3 School of Civil Engineering;Guangzhou University;Guangzhou Guangdong 510006;China |
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| Abstract: | Based on the theoretic analysis about the composing of the spatial headway,a car-following time model and a space headway random variable model were set up in consideration of the car-flowing time variable and the random distribution of speed,then an improved space headway model and an improved theoretic model for capacity were set up.The model was calibrated by the data of critical speed in HCM2000.Then the value of capacity was calculated and compared with the data in HCM2000,which shows that the differen... |
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| Keywords: | traffic engineering theoretic model space headway capacity |
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