信号交叉口自行车通行能力研究

为研究自行车在信号交叉口的通行能力,建立流体扩散模型.在深入分析自行车进入和驶出交叉口集聚扩散现象的基础上,用扩散距离D和散布角θ两个参数描述自行车在交叉12内的扩散及分布特征,并分析交叉口长度、信号周期及有效绿灯时间对自行车通行能力的影响,建立信号交叉12自行车通行能力模型.对北京中关村大街4个交叉12实测数据和模型预测结果的对比分析表明,二者平均误差仅为8.6%;模型完全能够应用于交叉口交通设计及控制.

Study on Bicycle Crossing Capacity at Signalized Intersection

To study bicycle crossing capacity at signalized intersections, a fluid diffusion model is proposed. Based on an analysis of centralization and diffusion of bicycle flow to and out of an intersection, two parameters including the diffusion distance and angle are used to reveal the feature of bicycle diffusion. The model reflects the influence of intersection length, signal cycle, and effective time on bicycle crossing capacity. Based on a comparison analysis of calculated data and field data from 4 signalized intersections in Beijing Zhongguancun Street, the average error is only 8.6 %. The model formulated can be used for traffic design and control of intersections.