改造现有公路(以下简称老路)的工作与新建公路有较大的不同,尤其是在测设方面,新线测设一般按任务书要求有一定的程序和做法,而改造老路则不必如此,当按照改造标准提出路线方案时,首先要考虑的是如何充分利用老路,路线必然受到老路的限制,因此对老路先要有一个认识过程。在踏 Reconstruction of existing roads (hereinafter referred to as the old road) is quite different from the construction of new roads. In particular, in terms of surveying and mapping, the survey of new lines generally requires certain procedures and practices as required by the mission statement. However, When putting forward the route plan according to the standard of transformation, the first thing to consider is how to make full use of the old road, and the route is bound to be limited by the old road. Therefore, we must first understand the process of the old road. In riding