This paper examines right-turning merging areas at junctions. The utilisation rate and headway distribution of the outside lane are set up at the exit of the intersection and used to study the conflict between the main traffic stream and the right-turning traffic. On the basis of the theory of gap acceptance and probability, under the condition that the flow rate of the right-turning vehicles do not reach a maximum capacity and that the right-turning vehicles arrive randomly, the availability of the acceptable gap is analysed and traffic efficiency of the right-turning merging area is examined. The traffic efficiency outcome can be used for the evaluation of the running status of the right-turning vehicles. The traffic efficiency of the right-turning traffic is calculated with different right-turning flow rates. It is concluded that the length and configuration of the acceleration lane for the merging area is a key factor for improving operational efficiency of this type of junction.

中文翻译：

---

交叉路口右转合并区域的运营效率

本文研究了路口右转合并区。在十字路口出口处设置外车道的利用率和车距分布，用于研究主要交通流与右转交通之间的冲突。根据间隙接受和概率的理论，在右转车辆的流量未达到最大容量且右转车辆随机到达的条件下，分析可接受间隙的可用性并研究了右转合并区的交通效率。交通效率结果可用于评估右转车辆的行驶状态。使用不同的右转流量计算右转流量的流量效率。