成都二环高架出口匝道与辅路对主路出口交通流特性的影响分析

Compact of Chengdu Ring Elevated Exit Ramp and Exit Roads on the Main Road Traffic Flow

城市高架路出口与地面辅路及其衔接段处经常伴有交通流拥堵现象,严重时将导致出口匝道处的车辆由于排队过长而上溯至高架路,影响其正常运行。本文对成都二环红牌楼东的部分道路进行数据采集,分析了高架路、出口匝道和地面辅路在信号交叉口下的交通流特性。并通过仿真实验,分析了辅路和出口匝道的车流运行状态对高架路出口的影响。该结果可为辅路车流的管理控制提供依据。

Urban expressway exit, supporting roads as well as the link segment are often accompanied with traffic jams, it will cause the vehicles on the off-ramp to trace back to the expressway to affect the normal operation of the vehicle on the main road, because the queuing is too long. In this paper, some roads near Hongpailou of Chengdu East Second Ring was selected and the data was collected, then the traffic flow characteristics of the expressway, off-ramp and supporting road with signalized intersections were analyzed. Through the simulation, the author analyzed the influence of the traffic operation status on the expressway exit of supporting road and off-ramp. The results may be the reference for managing and controlling the supporting roads.