# Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 1 (Q.No. 3)

3.

An ideal vertical curve to join two gradients, is

Discussion:

44 comments Page 1 of 5.
Basharat rabani said:
2 years ago

Ideal vertical curve is circular but vertical curve provided in field is square parabola for summit curves and cubic parabola for valley curves.

(3)

Anupam said:
2 years ago

A) Circular is the correct answer.

(1)

Atul said:
2 years ago

Ideal vertical curve is circular if sight distance available throughout the length of curve is constant it possible only in case of Joining one Gradient. In this case, two gradient are Joint by curve therefore sight distance is not constant throughout the length of curve so we provide Simple Parabolic curve.

(2)

Asif Jamal said:
2 years ago

Ideal vertical curve is circular if sight distance available throughout the length of curve is constant it possible only in case of Joining one Gradient. In this case, two gradient are Joint by curve therefore sight distance is not constant throughout the length of curve so we provide Simple Parabolic curve.

(2)

Pradipta majumder said:
3 years ago

Correct answer is circular.

Ideal summit curve is circular. But IRC recommend parabola.

Ideal summit curve is circular. But IRC recommend parabola.

(2)

Ajay said:
4 years ago

Option A is the correct answer.

Obaidb said:
4 years ago

Because the parabolic curve can be either sag or summit curve, in both the cases parabolic curve provides the best curve to provide maximum comfort to the passengers pr driver.

Anwar said:
4 years ago

Curves are two types they are Summit curve and valley curve.

And the best ideal curve is Summit curve.

And the best ideal curve is Summit curve.

Atul said:
4 years ago

Ideal curve is circular as per irc code.

Subhash Kumar said:
5 years ago

A cubic spiral is suitable to cubic parabola but latter is used mostly because of its ease in setting out. Vertical curves are provided to negotiate the gradient of the two straights. Parabola is most suitable shape for vertical curves since it provides a uniform rate of change of gradient and smooth riding condition.

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