在高速公路通道设计中,需根据高速公路路堤高度、现场调查的被交乡村道路交通量来合理地布置通道、选定通道类型,以及确定通道的净高和净宽设计标准。对于汽车通道,由于现在农村中汽车的数量和种类的不断增多以及农业的机械化进程不断加快,因此建议按四级公路标准进行通道设计,净高设计标准≥4.5m,净宽设计标准≥6m。 In the design of expressway, according to the embankment height of expressway and the traffic volume of rural roads handed in by on-site investigation, it is necessary to reasonably arrange the passageway, the type of passageway to be selected, and the design standard of net height and net width of passageway. For the car passageway, as the number and variety of cars in rural areas are increasing and the mechanization of agriculture accelerates, it is suggested to design the passageways according to the Grade IV highway standards with the standard of clear height of ≥4.5m and the standard of clear width of ≥6m.