考虑直线式公交停靠站影响的交叉口通行能力计算模型

Capacity calculation model for signalized intersections under impact of on-line bus stop

为了更为准确地计算信号控制交叉口通行能力,在HCM2010方法的整体框架下,针对交叉口上游直线式公交停靠站对通行能力的影响进行了研究。运用交通流理论,分析了在不同到达时刻条件下,单辆公交车停靠对所在车道绿灯损失时间的影响。在此基础上,运用概率论,分别建立了公交停靠站所在车道为直右共用车道、右转专用车道和右转与公交共用车道三种情况的交叉口通行能力计算模型,并对影响因素进行了敏感性分析。研究结果表明,公交停靠站与交叉口的间距以及公交停靠站所在车道的车辆到达率对通行能力起主要作用,实践中应保证公交停靠站与交叉口的间距能满足该车道红灯期间车辆排队长度要求。

In order to improve the estimation accuracy of the capacity at signalized intersections, this paper analyzed the im- pact of the near-side on-line bus stop on the capacity based on the calculation framework in HCM2010. Using the traffic flow theory, it analyzed the green loss time caused by one bus stopping under different arrival time conditions. On this basis, it es- tablished the capacity calculation model by the probability theory under three conditions of the lane assignment on the bus loa- ding lane, including the shared through and right-turn lane, exclusive right-turn lane, and shared bus and right-turn lane. It conducted the sensitivity analysis of key factors. The results show that both the distance between the bus stop and intersection stop line and the arrival rate of the bus loading lane affect the signalized intersection capacity greatly. In practice, the distance between the bus stop and intersection stop line should be long enough to accommodate the queue length of the vehicles arrived during red time.