b. A section of a highway has vertical and horizontal curves with the same design speed. A vertical curve on this highway connects a +1% and a +3% grades and is 126 m long. If a horizontal curve on this highway is on a 2-lane section with 3.6 m lane width, has a central angle of 37 degrees, and has a superelevation of 6%, what is the length of the horizontal curve? Show all your work.

b. A section of a highway has vertical and horizontal curves with the same design speed. A vertical curve on this highway connects a +1% and a +3% grades and is 126 m long. If a horizontal curve on this highway is on a 2-lane section with 3.6 m lane width, has a central angle of 37 degrees, and has a superelevation of 6%, what is the length of the horizontal curve? Show all your work.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A highway engineer must stake a symmetrical vertical curve where an entering grade of +0.80% meets an existing grade of -0.40% at station 10 + 100 which has an elevation of 140.36 m. If the maximum allowable change in grade per 20 m station is -0.20%, what is the length of the vertical curve? Discuss, how you derive your answer on the question above.
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