在研究混行公交进口道交通运行组织的基础上,对混行公交进口道长度组成要素进行了分析,将其分为交织段长度、减速段长度和存储段长度3部分.结合概率论相关知识,以转向车辆换道行驶距离为判断依据,建立了交织段最小长度模型.以渐变段长度和减速距离为限制条件,对减速段长度进行了研究.分析了直行、混行和左转进口车道排队长度计算方法,得到了进口道存储段长度的计算公式.最后计算了不同设计流量和交通流组成下的混行公交进口道设置长度.结果表明,该方法可计算不同条件下的混行公交进口道设置长度.
Based on the research of traffic operation organization for mixed-traffic bus approach,compositive elements of the length of mixed-traffic bus approach are analyzed,which include the length of weaving segment,deceleration segment and storage segment.Combining the relevant knowledge of probability theory,a minimum-distance model of weaving segment has been established with the length of lane-changing as main criterion.Taking the length of the tapered section and the deceleration length as constraints,the length of the deceleration segment was studied.The layout length of the storage segment has been calculated by analyzing the queue length of through lanes,mixed-traffic lanes and left-turn lanes.Finally,the layout lengths of mixed-traffic bus approach with different design flows and compositions of traffic flow were calculated.The results show that the proposed method can be used to calculate the layout length of mixed-traffic bus approach under different conditions.