公交站点车辆停靠对信号交叉口进口道交通延误模型

Traffic delay at signal-controlled intersection with bus stop upstream

为评价进口道具有公交停靠站信号交叉口的公交停靠影响和车辆运行效益,建立公交站点车辆停靠对信号交叉口进口道的交通延误模型.根据公交车停靠对不同类型信号交叉口交通延误影响情况的不同,将影响延误模型分为3类.针对最常见的影响延误模型,首先通过详细分析不同情况下公交车停靠对信号交叉口进口车辆的作用机理,研究分情况的交叉口进口车辆延误计算方法和计算公式;然后根据这些延误计算公式,利用积分方法,得到一套公交车辆停靠对交叉口进口车辆平均延误的计算公式.该公式能较好地计算进口道具有公交停靠站的信号交叉口进口车辆延误,为有效改造和合理布设公交站点提供理论基础与定量分析工具.

To calculate traffic delay at signal-controlled intersection with bus stop upstream, a set of formulae is established. Based on the different traffic impacts from bus stopping at different signalized intersections, delay models are sorted. Aiming at a conventional delay model, the effect of bus stopping on entrance traffic flow of signal-controlled intersection is analyzed, calculation methods about delay of entrance vehicle in different cases are studied. Based on the calculation methods, a set of calculation formulae about average delay of entrance vehicle are found using integral method. Test results show that the formulae can calculate average delay of entrance vehicle better at signal-controlled intersection with bus stop upstream, and provide quantitative analysis tools for evaluating traffic operation and setting bus stops at signalized intersections.