What information do profile views typically convey in plan reading?

Profile views are essential in plan reading as they illustrate the vertical representation of a layout, capturing the changes in elevation along a specific alignment. This includes showing the heights and depths of various features, including roadways, slopes, and utilities, by indicating their vertical elevations at different points. By interpreting the profile view, engineers and planners can assess how the terrain changes and make informed decisions regarding grading, drainage, and alignment.

In contrast, cross-section dimensions focus on the width and height of a feature at a specific point rather than changes in elevation over distance. Lateral clearances pertain to the horizontal space required for safety and functionality, which is not represented in profile views. Surface treatments are about the materials and methods used on the surface, like pavement types, and also not depicted through elevations. Thus, profile views are crucial for understanding how elevations change, especially in roadway design and civil engineering projects.