|
The vertical alignment of a road consists of gradients(straight lines in a
vertical plane) and vertical curves.
The vertical alignment is usually drawn as a profile, which is a graph with
elevation as vertical axis and the horizontal distance along the centre line of
the road as the the horizontal axis.
Just as a circular curve is used to connect horizontal straight stretches of
road, vertical curves connect two gradients.
When these two curves meet, they form either convex or concave.
The former is called a summit curve, while the latter is called a valley curve.
This section covers a discussion on gradient and summit curves.
|
|
