Curve surveying

Introduction

Though there are a variety of curve surveying here the discussion is mainly constrained to

1)Reverse curves

2)Transition curves and 

3)vertical curves

the source for the page is from  Surveying, volume 2 by Punmia and from global video library youtube

2.1)Reverse curves

2.1.1)What do you mean by a reverse curve?

A reverse curve consist of two simple curves of opposite directions that joint together at a common tangent point known as "Point of reverse curvature"(P.R.C). 

2.1.2)Speciality of reverse curve

Their change in direction at Point of reverse curvature is instantaneous. Reverse curves are pleasing to the eyes and are used in park roads, formal paths and waterway channels.

 D2.1.3)Disadvantages of reverse curves

The change of direction at point of reverse curvature is instantaneous as a result:

1) Sudden change of direction is required on either side of P.R.C.

2)No way to rise the outer bank of the curve.
3)From a passenger prospective sudden change in direction is objectionable and dangerous.
4)Steering is dangerous.

*elements of a reverse curve to be updated soon