The current approach to optimizing the urban intersections is to set waiting-areas for left-turning and waiting-areas for direct movement,but the two methods have their own setting conditions, and have some re-quirements for geometric characteristics of the intersections and traffic. The integrated area is a new method for the improvement of the intersections in recent years,which can increase the queuing capacity, shorten the queu-ing length indirectly, and reduce the vehicle delay on the basis of making full use of the road space. In order to optimize the traffic situation, the site survey and analysis of the intersection of Changnan Road and Yingbin North Road in Nanchang city were carried out. The integrated waiting area was set to optimize the intersection, and the road modeling and simulation were carried out.The research results show that the setting of the integrat-ed waiting area can improve the traffic capacity and efficiency of the intersection and reduce the delay as well.%当下城市交叉口优化方面通常采用的方法是设置左转待行区和直行待行区等,但都有其自身的设置条件,对交叉口的几何特征和交通量都有一定的要求.综合等待区是近几年提出的交叉口优化的较新方法,该方法在充分利用道路空间的基础上能间接的增大排队容量并减少了排队长度,降低车辆延误.为更好的优化交叉口的交通状况,对南昌市昌南大道与迎宾北大道交叉口进行实地调查和分析,通过设置综合等待区的方法加以优化设计,并对路口范围道路建模和仿真,最终效果和数据表明综合等待区的设置能较好地提高该交叉口的通行能力和效率,减少延误.
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