Chapter 7. Laying a Path: Alignments

The world is 3D, but almost every design starts as a concept: a flat line on a flat piece of paper. Cutting a way through the trees, the hills, and the forests, you can design around a basic layout to get some idea of horizontal placement. This horizontal placement is the alignment and drives much of the design. This chapter shows you how alignments can be created, how they interact with the rest of the design, how to edit and analyze them, how styles are involved with display and labeling, and finally, how they work with the overall project.

By the end of this chapter, you'll learn to:

  • Create an alignment from a polyline

  • Create a reverse curve that never loses tangency

  • Replace a component of an alignment with ...

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