Principles of Highway Engineering and Traffic Analysi (NEW!!)
6th Edition
ISBN: 9781119305026
Author: Fred L. Mannering, Scott S. Washburn
Publisher: WILEY
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Chapter 3, Problem 31P
To determine
The minimum bridge tunnel separation distance needed to connect the elevations of the bridge and tunnel with
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Question 2
The maximum speed of a vehicle on a 4º curve having arc length 30 m is limited to 60 kmph. Calculate the
psychological widening required on the curve.
Problem 5
An existing horizontal curve on a highway has a radius of 465 ft, which restricts the posted speed limit to
only 61.5% of the design speed on this section of the highway. If the curve is to be improved, so that its
posted speed will be the design speed of the highway, determine the minimum radius of the new curve.
Assume that the rate of superelevation is 0.08 for both the existing curve and the new curve to be
designed and f,=0.16 for 40 mph, 0.14 for 50 mph, 0.12 for 60 mph, and 0.10 for 70 mph.
Q1:
If a 8⁰ curve track diverges from a main curve of 5° in an
opposite direction in the layout of a B.G. yard, calculate the
superelevation and the maximum permitted speed on the main
line, if the maximum speed permitted on the branch line is 35
kmph.
Chapter 3 Solutions
Principles of Highway Engineering and Traffic Analysi (NEW!!)
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