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针对非机动道路内电动自行车与传统自行车混合行驶的交通现象,在分析混合自行车交通流特性的基础上引入Logistic模型,利用数值分析方法建立了适用于描述混合自行车流量-密度关系的数学模型与自行车道通行能力计算模型,利用杭州市6个路段的实测数据进行数据拟合,得到了通行能力估计值,对车流样本中的最大速度、自由流速度、最佳密度进行了参数敏感性分析。研究结果表明:6个路段数据的拟合优度分别为0.92、0.93、0.93、0.95、0.98、0.96,通行能力分别为2 968、2 641、2 687、2 754、2 646、3 065bic·(h·m)~(-1),因此,模型能较好地描述城市混合自行车交通流在不同状态下的变化特征,为进一步揭示城市自行车道内混合自行车交通流运行机理提供了新的思路。
Based on the analysis of the mixed traffic flow characteristics of hybrid bicycles, a Logistic model is introduced to analyze the traffic phenomena mixed with traditional bicycles in non-motorized roads. A mathematical model suitable for describing the flow-density relationship of hybrid bicycles and a bicycle Road traffic capacity calculation model, the measured data of 6 sections in Hangzhou were used for data fitting, and the traffic capacity estimation value was obtained. The parameter sensitivity analysis was carried out on the maximum speed, free-flow speed and optimal density in the traffic flow samples. The results show that the goodness of fit of the six sections are 0.92, 0.93, 0.93, 0.95, 0.98 and 0.96, respectively, and their capacities are 2 968,2 641,2 687,2 754,2 646,3 065bic • h · m) -1. Therefore, the model can better describe the changing characteristics of urban hybrid bicycle traffic flow in different states, which provides a new idea for further revealing the traffic flow mechanism of hybrid bicycle in urban bicycle lane.