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Given the following plan set, identify the following for the mainline centerline proposed alignment: a) Stationing for the PC
Question 9: Given the horizontal curve illustrated in Question 8, calculate the following: a) External distance: b) Length of
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Answer #1

PC: Point of Curve

PT: Point of tangent

from the given plan,

the stationing of PC is at 3+21.19 = 321.19 ft

the stationing of PT is at 7+13.16 = 713.16 ft

the radius of the curve, R = 275.00 ft

intersection angle, delta

length of curve, L = 713.16-321.19 = 391.97 ft

L = R*(delta)

delta = 397.97/275 = 1.4253 radians = 81o39'58.6"

external distance, distance other than in curve = (321.19-200)+(800-713.16) =208.03

Kindly see the answers and let us know if you need more details. Only the first question is to be solved as per the policy norms.

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