A road's horizontal alignment is shown on which type of views?

A road's horizontal alignment is depicted in plan views. These views provide a bird's-eye perspective of the road layout, allowing planners and engineers to illustrate the path a road will take in relation to the surrounding area. In plan views, you can see the geometric features like curves, straight sections, intersections, and how the road aligns with existing features, which is essential for determining how the roadway will integrate with the landscape and other infrastructure.

In contrast, elevation views focus on vertical aspects, showing how a road or structure will appear from the side, which is important for understanding the height and slope but does not convey horizontal alignment. Profile views illustrate the changes in elevation along the length of a road, highlighting grade changes but again do not represent horizontal routing. Section views provide a cross-sectional look at the road or other structures, which is useful for detailing the design but not for depicting the horizontal alignment itself. Therefore, it is in plan views where the full layout of the road's horizontal alignment is effectively communicated.