摘要
对城市快速路车头时距分布的特征进行了详细分析,将分布曲线划分成反映不同交通情况的区域,以此为基础对交通流基本特性和理想状态下的车头时距提出假设。使用q—指数形式函数对分布曲线进行非线性回归拟合,并应用叠加统计变量的概念建立了车头时距的分布模型,并能够很好地从交通流基本特性出发解释分布曲线的形状特征。
This paper analyzes the characteristics of headway distribution for urban expressway traffic. The distribution curve obtained from empirical data is divided into four regions which reflect dif- ferent microscopic situations, and assumptions are made to obtain an idealized traffic situation, of which the distribution curve is fitted using q-exponential forms. Based on the concept of superstatistics, a model linking the basic characteristics of traffic flow to the headway distribution is proposed, which gives a good explanation for the distribution curve.
出处
《公路工程》
2010年第1期143-145,154,共4页
Highway Engineering
