通过对罗岑线的勘测设计过程,阐述了在山岳地区选线,在保持大方向前提下,一般可沿河谷走行。当遇山嘴,可沿山嘴绕行。在越岭地区,关键在于选择好越岭垭口。当线位大方向已定时,需采用横断面确定局部线位。 Through the investigation and design process of Rozen line, it is expatiated that the line selection in the mountainous area can be followed along the river valley under the precondition of keeping the general direction. In case of mountain mouth, can bypass the mountain mouth. In the Yue Ling area, the key lies in choosing the Yue Ling Pass. When the line has been the general direction of the timing, the need to use cross-section to determine the local line.