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Introduction of basic transportation engineering
This document discusses road alignment and classification. It defines road alignment as the position of the center line of the highway on the ground. There are two types of alignment: horizontal and vertical. It also lists factors that affect road alignment such as availability of construction materials, obligatory points, grades, crossings, geology, drainage, traffic, land acquisition, economics, and other miscellaneous factors. The document also discusses engineering surveys used in locating highway alignment and classifications of roads based on use, carriageway, pavement surface, location, traffic, and function.
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