紧急避险车道与互通立交设置间距研究

Research on the spacing between emergency escape lanes and interchanges

针对先出后入型立交,着重分析主线交通特性、救援、交通工程设施和避险车道内事故等因素对避险车道设置的影响。结合出口匝道与入口匝道的不同特点,分别分析紧急避险车道与出口、入口匝道的设置距离。其中,与出口匝道的设置距离受出口匝道分流距离、标志设置和抛洒物的影响;与入口匝道的设置距离受主线汇入车辆行驶速度的影响。通过数据分析得出,紧急避险车道与匝道出口的间距应不低于750 m,紧急避险车道制动床的终点与匝道出口的间距应不低于300 m,匝道入口与紧急避险车道入口的间距应不低于760 m。

Focusing on analyzing the impact of factors such as main traffic characteristics,rescue,traffic engineering facilities,and accidents in the escape lane on the setting of the escape lane for first out then in type interchanges.Based on the different characteristics of exit ramps and entrance ramps,analyze the distance between emergency escape lanes and exit and entrance ramps.Among them,the setting distance from the exit ramp is influenced by the diversion distance of the exit ramp,the setting of signs,and the throwing of objects;the setting distance from the on-ramp is influenced by the speed of incoming vehicles on the main line.According to data analysis,the distance between the emergency escape lane and the ramp exit should not be less than 750 m,the distance between the end of the emergency escape lane brake bed and the ramp exit should not be less than 300 m,and the distance between the ramp entrance and the emergency escape lane entrance should not be less than 760 m.