Assertion (A): Square parabola is generally recommended for vertical curve compared to circular curve.
Reason(R): Square parabola enables comfortable transition from one grade to the other
Assertion (A) is true: In highway engineering, a square parabola (quadratic parabola) is widely
preferred and recommended for vertical curves over a circular curve.
Reason (R) is true: The primary reason for this preference is that a parabola provides a constant
rate of change of grade, which ensures a smooth and comfortable transition for vehicles moving
from one gradient to another.
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