Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 15, Problem 14P
To determine
(a)
The radius of the curve.
To determine
(b)
The current maximum safe speed of the curve.
To determine
(c)
The allowable distance (minimum) between the structure proposed and the center line of the curve, such that the current maximum safe speed of the curve does not have to be reduced.
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A simple circular curve exists with a degree of curve D = 12º and e = 0.08. A
structure is proposed on land on the inside of curve. Assume the road is on level grade.
Determine:
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(b) The current maximum safe speed of the curve
(c) The minimum distance allowable between the proposed structure and the
centerline of the curve such that the current maximum safe speed of the
curve would not need to be reduced
A vertical parabolic curve has a sight distance of 150 m. The curve has tangent grade of 3% and -2%. If the height of the dirver's eye from the pavement is 1.08 m and the height of the object is 0.5 m. The design speed for the curve is 80kph.
a.) Compute the maximum length of the curve
b.) Compute for the maximum speed of the curve c) If the curve has 120 m sight distance compute for the maximum speed of the curve
A 500-m long equal tangent vertical curve has a point of vertical curvature at station 2 + 600 and elevation 450 m. The initial grade is -5%
c) determine the desing speed for this vertical curve( in 10 km/h increments )
Chapter 15 Solutions
Traffic and Highway Engineering
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