摘要
由于全苜蓿叶或相邻象限设置环形匝道的部分苜蓿叶互通存在距离很近的相邻进出口,互通内主线存在交织区且交织长度短,交织车辆易对主线直行车辆造成影响。为提高主线的通行能力与行车安全,经验上一般在存在交织区的主线设置集散车道。考虑设置集散车道后,互通的占地与工程造价会较大幅度增加,设计阶段需对设置集散车道的必要性进行论证。利用美国《道路通行能力手册》(HCM2000)中对高速公路交织区通行能力的计算方法,介绍了全苜蓿叶枢纽互通是否需要设置集散车道的论证过程与方法。
Because of its short distance of weaving sections which exist in cloverleaf type interchange,traffic flow in weaving sections affect the safety of major lanes＇ traffic flow.In order to increase the safety of traffic flow in major lanes,auxiliary lanes were been used as a matter of experience.However,the R-O-W and cost of cloverleaf type interchange were increased in vast scale with the addition of auxiliary lanes,so the necessity of setting auxiliary lanes need to be demonstrate in design stage.By the use of the calculation procedure of weaving section＇s capacity,this paper introduced a systematic design procedure in demonstrating the necessity of highway＇s auxiliary lanes.
出处
《公路工程》
2011年第4期8-11,共4页
Highway Engineering
基金
交通部西部交通建设科技项目(200731800003)
关键词
苜蓿叶互通
集散车道
交织区
服务水平
cloverleaf type interchange
auxiliary lane
weaving section
service level
