设置间歇式公交专用进口道的流量条件研究

针对交叉口处公交车辆对道路资源需求的动态特征，提出了一种间歇式公交专用进口道的控制系统及控制方法。为了得到间歇式公交专用进口道适用的交通流量条件，首先研究了设置间歇式公交专用进口道后社会车辆和公交车辆的延误；然后通过算例定量分析了设置间歇式公交专用进口道前后交叉口人总延误差的变化规律。研究结果表明：在同一交通流向有两条进口车道的情况下，周期时长为60s、100S、120S的交叉口设置间歇式公交专用进口道的临界交通饱和度分别为0．75、0．65、0．60。当进口道交通饱和度小于临界交通饱和度时，可以考虑在该流向设置间歇式公交专用进口道。

Research on Traffic Flow Coditions for Set Intermittent Bus-only Approach

According to the characteristics of buses＇ dynamic demand for road resources at intersections, a contral system of intermittent bus-only approach and its control method were put forward. In order to get traffic flow conditions for the intermittent bus-only approach, the paper studied social vehicle delay and bus delay after setting intermittent bus-only approach analyzed before and Then, after through an example, the total person delay differences were setting the intermittent bus-only approach. Research resultsshowed that： if the same traffic direction had two approaches, the critical saturation for the cycle equaled to 60s, lOOs and 120s were 0.75, 0.65 and 0.60 separatly. When the approaches＇ saturation was approach might be considered less than the critical saturation, the intermittent bus-only to be installed at the intersection.