双交叉菱形立交平面线形设计关键指标探讨

Discussion on the Key Index of Plane Alignment Design of Double Cross Rhomboid Interchange

为了提升我国道路工程互通立交设计水平,总结了双交叉菱形立交的交通流特点和适用性,分析了双交叉菱形立交的平面线形关键指标设计原则及反向曲线参数、平交口视距、平交口交叉角度、交织区长度和宽度等平面线形指标的设计方法,并利用VISSIM软件对双交叉菱形立交交织区交通开展仿真模拟,计算了各个监测点的延误。

In order to improve the design level of road engineering interchange in China,this paper summarizes the traffic flow characteristics and applicability of double-cross rhomboid interchange,analyzes the design principles of key plane alignment indexes of double-cross rhomboid interchange and the design methods of plane alignment indexes such as reverse curve parameters,horizontal crossing visual distance,horizontal crossing angle,length and width of interweaving area.The traffic in the interweaving area of double cross diamond interchange is simulated by VISSIM software,and the delay of different monitoring points is calculated.