Abstract: Based on summary of the reason of traffic congestion in joint area, a list of feasible engineering measures was made in the thesis. Simulated the measures by using VISSIM software modeling a typical ramp, for example, it was indicated that the interference of bicycle and pedestrian was vital to the whole traffic system. The degree of improvement of extending the length of join t area through the evaluation on various traffic condition of different length of joint areaw as also studied. As a result, a theoretical basis of whether or not and how to take an engineering measure of out-ramp area in Shanghai as well as in China was provided

Key words: elevated road out-ramp, joint area, vissim simulation, degree of improvement, length of joint area, right turn vehicle, interfe rence of bicycle and pedestrian

摘要： 在总结出口匝道拥挤的成因的基础上列举可能采取的各项工程措施。利用VISSIM仿真软件对典型出口匝 道建模,针对各工程措施进行仿真研究,指出机非干扰是影响交通改善程度的重要因素;通过评价模型中不同衔接 段长度下的交通运行状况,研究延长衔接段长度对交织区交通运行改善程度。为高架道路出口匝道区域工程改造 实施与否以及如何实施提供理论依据。

关键词: 高架道路出口匝道, VISSIM仿真, 改善程度, 衔接段长度, 右转车, 机非干扰