路侧公交专用车道下右转出口上游公交车头时距分布特征

为了描述公交专用车道模式下右转出口上游公交车的车头时距分布特征，考虑公交停靠站对公交车头时距分布的影响，将研究对象分为两类。基于实测数据，对公交车头时距进行非线性回归拟合，并通过卡方检验对各组数据进行拟合优度检验，从定性和定量角度对公交车头时距分布进行分析。研究结果表明：第Ⅰ类公交车头时距服从负指数分布，第Ⅱ类公交车头时距服从移位负指数分布。最后，基于可插间隙理论，建立了右转车辆在交织区延长后的通行能力模型；结合两种类型下的公交车头时距分布模型，分别建立了交织区长度与公交车流量和右转车流量的关系模型。

Study on Distribution Characteristics of Bus Headway Upstream of Right-turn Exit under Road-side Bus Lane Mode

In order to describe distribution characteristics of bus headway upstream of right-turn exit under road-side bus lane mode, considering the influence of bus stops on the bus headway distribution, the research objects are divided into two categories. Based on the measured data, the bus headway is fitted non-linearly, and the goodness-of- fit of model is verified through a Chi-square test against 4 sets of observed data. The results show that the bus headway of type I obeys the negative exponential distribution, and that of type II obeys the shift negative exponential distribution. Finally, based on the pluggable gap theory, the traffic capacity model of right-turning vehicles with extended weaving length is established, and the relationship model between weaving length and bus flow and right-turning traffic flow is established respectively by combining the bus headway distribution model under two types.