路口非机动车流相关运行特性的研究是减少路口机非冲突的重要基础。本文引入膨胀度的概念，利用视频坐标法，对路口左转混合非机动车流的膨胀效应进行了定量研究，并与纯自行车流的膨胀效应进行了对比分析，发现混合非机动车流的膨胀效应比纯自行车流来得明显。在此基础上，借鉴相关研究成果，提出了基于非机动车流膨胀效应的路口左转机非冲突分析方法，并通过案例分析表明该方法是可行的。%Motion characteristics of bicycle flow at the intersections are analyzed in the paper as the important premise to reduce the vehicle-bicycle conflict. Quantitative research on mixed bicycle flow expansion effect is conducted with the introduction of the concept of “expansion intensity” and the adoption of “video coordinates”, meanwhile, a comparative research is made on the expansion effect of pure bicycle flow, which helps with the discovery that the mixed bicycle flow has a more obvious expansion effect than the pure bicycle flow, on the basis of which, the analysis method for the left turning vehicle-bicycle conflict at the intersection is concluded based on the bicycle flow expansion effect, and the foregoing method is proved to be feasible through the case analysis.
展开▼
