非信号控制交叉口通行能力及延误特性

应用通行能力及延误数学模型,研究了四路双车道主路优先、四路停车以及环形交叉口在不同交通分布模式下的交叉口通行能力及延误特性.研究发现,主路优先控制下主要道路车流通过交叉口延误小,抗交通流量扰动性好,但次要道路车流通过交叉口延误大,同时在交叉口各进口道交通量趋于平衡或左转车流比例较大时效果较差.四路停车控制方式对交叉口各进口交通量非平衡情况及左转车流比例较大情况适应性最好,但通行能力较低,抗扰动性能较差.环形交叉口通行能力较大,对进口道交通量非平衡情况、左转车流比例较大情况以及进口道车流扰动情况的适应能力介于前两者之间,但在交通量较小时延误较大.给出了各类控制方式适宜的交通条件.

Capacity and delay performance of unsignalized intersection

This paper studied the differences on capacity and delay performance of two 2-lane streets intersections between two-way stop-controlled(TWSC) types,all-way stop-controlled(AWSC) types and roundabouts under different flow patterns based on mathematic models.The TWSC intersection has some advantages as low delay of major street and good performance of anti-disturbance,while the delay of minor street are higher and it also shows inefficient under balanced flow pattern.The AWSC intersection shows good performance in the case of unbalanced flow patterns and high left-turn percentage,but it has a low capacity and bad performance of anti-disturbance.Roundabout has a high capacity and relative steady performance in all kinds of cases,while the delay is higher than the other two control types in low volume case.Finally,the paper proposed the suitable conditions for the utilization of each type intersection.