信号控制交叉口自行车流体扩散模型

A Bicycle Flow Diffusion Model at Signalized Intersections

如何确定信号控制交叉口自行车的通行能力对交叉口配时和渠化设计有重要意义。揭示了信号控制交叉口自行车流的运行特性,建立了自行车流体扩散模型,对不同交叉口宽度、不同信号配时的混合交通条件下交叉口自行车通行能力进行计算,得出交叉口宽度与自行车通行能力呈负线性相关。通过自行车流体扩散影响分析,得出自行车对机动车、尤其是同向右转及对向左转车辆的通行能力影响较大的结论。最后,根据哈尔滨市4个信号控制交叉口实际调查数据,得到考虑机动车影响的信号控制交叉口自行车通行能力计算结果,并与北京市观测值进行了对比。

It is critical to determine bicycle capacity at signalized intersections for signal timing design and traffic improvement. According to characteristics of bicycle flow at signalized intersections, this paper establishes a bicycle flow diffusion model. Based on the calculation results of bicycle capacity at signalized intersections by different widths of the approach and signal timing, the paper concludes that bicycle capacity has a negative linear correlation with the width of the approach. In light of an analysis on diffusion impacts, the paper adjusts the model with consideration of the impacts of vehicle traffic at signalized intersections. Finally, a case study based on an investigation at four signalized intersections in Harbin is conducted to obtain bicycle capacity with the impact of vehicles and a comparison with observations in Beijing.