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。
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 difference is very little and the model can simulate the actual traffic flow characteristics. After that, the influence of maximum carfollowing time and the standard deviation of speed on capacity was analyzed. At last, the model was calibrated and checked up by the traffic flow data of urban arterial street. The result proves that the model is able to fit the traffic flow of urban road and the model is feasible and practical.
出处
《公路交通科技》
CAS
CSCD
北大核心
2010年第2期103-107,113,共6页
Journal of Highway and Transportation Research and Development
基金
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)
关键词
交通工程
理论模型
车头间距
通行能力
traffic engineering
theoretic model
space headway
capacity
作者简介
臧晓冬（1969-），男，黑龙江宾县人，博士研究生，副教授，研究方向为交通流理论与交通设计．（zxdzxdzxd69@yahoo．com．cn）
