In an ideal transition curve, the radius of curvature
(A) Is constant
(B) At any point is directly proportional to its distance from the point of commencement
(C) Is inversely proportional to the radius of main curve
(D) Is directly proportional to the radius of main curve
(A) Is constant
(B) At any point is directly proportional to its distance from the point of commencement
(C) Is inversely proportional to the radius of main curve
(D) Is directly proportional to the radius of main curve