What are the example of vertical curve??

1. Crest curve: A vertical curve where the road rises to a peak before descending again.

2. Sag curve: A vertical curve where the road dips down before rising again.

3. Parabolic curve: A smooth, symmetrical curve that is commonly used in road design to connect two different grades.

4. Compound curve: A combination of two or more simple curves that are connected to form a more complex vertical curve.

5. Reverse curve: A vertical curve that changes direction, typically from a crest curve to a sag curve or vice versa.

- Overpass: A bridge that carries a road or railroad over another road or railroad.
- Underpass: A bridge that carries a road or railroad under another road or railroad.
- Interchange: A complex system of overpasses and underpasses that connects multiple roads or highways.
- Spiral: A curved section of road or railroad that gradually changes direction from one tangent to another.
- Parabolic curve: A curve that follows the shape of a parabola.
- Circular curve: A curve that follows the shape of a circle.
- Compound curve: A curve that consists of two or more curves with different radii.
- Reverse curve: A curve that changes direction twice, first in one direction and then in the opposite direction.