这个水平横断面可以派生出两个垂直横断面。
Two vertical perpendicular cross sections can be derived from the horizontal cross section.
一些传统观念认为，提高公路横断面要素指标有利于安全水平的提高，由此倾向于修建更宽的公路，这在平原区尤其明显。
Sometimes it is considered that the increasing of highway cross-section width is helpful for highway safety, so some wider highways are built, especially in plain areas.
具体包括出入口道路交通量的预测、出入口道路通行能力、服务水平、横断面规划等。
Including import and export of specific road traffic projections, import and export road capacity, service levels, cutting planning.
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