Chapter 9 Designing in 3D Using Corridors

Long before AutoCAD® Civil 3D® objects, CAD, or even computers existed, engineers were designing roads and other linear features in three stages: alignment, profile, and cross section. I suspect the reason for this is that it’s much easier to think of a design one dimension at a time rather than think of all three dimensions at once. This was especially true before designs could be visualized in 3D on a computer screen. This approach to linear design has carried right through to the present day and is still evident, even with cutting-edge technology such as Civil 3D.

You have already learned about the alignment and profile stages of this design approach. In this chapter, you’ll learn how assemblies ...

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