G324与某立交相交路段通行能力评价及改善措施

Traffic Capacity Evaluation and Improvement Measures on the Connecting Section between G324 and an Interchange

某互通立交为G324与某新建高速公路连接的一般互通,采用左侧进出匝道的方式,占用G324广州方向内侧车道,压缩原有道路断面。该方案决策需分析立交匝道设置对G324通行能力的影响。基于近10年的路段断面当量交通量数据,利用二次移动平均法预测目标年交通量,分析该路段通行能力及服务水平,结果表明在目标年内该路段通行能力及服务水平等级基本符合要求。为提高"左进左出"路段通行能力和安全水平,提出了相应的交通安全改善措施。

A certain interchange is the general connection between G234 and a new expressway adopting the entrance and exit in and out the ramp from left side.It occupies the inner lane of G324 to Guangzhou direction,compressing the original road section.In order to analyze the overpass ramp setting effects on the G234＇s capacity,based on the equivalent traffic flow data of the section in recent 10 years,the Double Moving Average Method is used to predict traffic in target year,the road traffic capacity and service level are analyzed.The results reveal that the target year road traffic capacity and service level meet basic requirements.For the propose of improving the capacity and security level of ＂left in and left out＂ road section,this paper also puts forward the corresponding measures to improve traffic safety.