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MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
5th Edition
ISBN: 9781305577398
Author: Nicholas J. Garber; Lester A. Hoel
Publisher: Cengage Learning US
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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:
(a) The radius of the curve
(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
(b)
For the safe road design and smooth traffic flow, combination of transition and
circular curve will be constructed to combine two tangent line that have bearing of
N 70° E (entry tangent) and S 80° E (exit tangent) respectively. With the aid of
sketch, design the minimum length of transition curve and circular curve that has
the following characteristics
• Design speed = 110 km/hr
coefficient of side friction, f= 0.15
Superelevation, e = 5 %
• Radial acceleration, c = 0.9 m/s³
A building is located 40 m from the centerline of the
inside lane as shown. The SSD (Stopping Sight Distance)
is 600 m with the length of the curve at 550 m.
Determine the following:
a.) The minimum radius of the curve
b.) The radius of the curve
L = 550 m
SSD = 600 m
40 m
R.
Rmin
Rmin
Chapter 15 Solutions
MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
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