Question

State and define different kinds of curved roads.

Answer 1

The road curves are the irregular bends in roads to change the direction. There are two types of curved roads: horizontal curved roads and vertical curved roads. The curved roads are distinguished by their varying radius and common tangent.

Complete answer:
As we know the road curves are the irregular bends in roads to change the direction. There are five types of horizontal road curves.
1. Simple curve
2. Compound curve
3. Reverse curve
4. Deviation curve
5. Transition curve

1. Simple curve: We know that the simple curve is the single arc of the circle with the same radius throughout the curve. The tangents at each point on this curve meet at a common point.
2. Compound curve: We know that the compound curve is a combination of two or more simple curves of different radii that bends the same way.
3. Reverse curve: The reverse curve is also known as serpentine curve. When the two simple curves are bent on the opposite sides, it forms the reverse curve. The two simple curves of the reverse curve are on the opposite side of the common tangent.
4. Deviation curve: When the two reverse curves are joined to avoid the buildings or other sites.
5. Transition curve: We have seen that while taking the turn along the curved road, the outer side of the road is banked. This elevation of the roads is known as the transition curve.

Note: We are asked to state and define the different kinds of curved roads and not the curvilinear motion. The compound curve has two simple curves which are on the same side of the common tangent. The radius of the curve does not vary in the simple curve and it may vary for all other curves.