Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 14, Problem 17P
The following table shows the stations and ordinates for a mass diagram. The free-haul distance is 600 ft. Overhaul cost is $12 per station yard.
(a) Use the method of moments to compute the additional cost that must be paid to the contractor.
(b) Sketch the ground profile if the finished grade of this roadway section is level (0 percent).
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INSTRUCTION: COMPLETE SOLUTION WITH FIGURES. BOX YOUR FINAL ANSWER.
An underpass crossing a reinforced concrete bridge along the Shaw Blvd has a symmetrical vertical curve, having a
downward grade of -4% meeting an upward grade of +7.5% at the vertex V at elevation 70 m and stationing of 7+700,
exactly underneath the center line of the bridge having a width of 10 m. If the required minimum clearance under the
bridge is 5 m, and the elevation of the bottom of the bridge is 78.10 m.
a) Determine the length of the vertical parabolic curve that shall connect the two tangents.
b) Determine the stationing of the point a catch basin (lowest point) will be placed.
c) Determine the elevation of the point where a catch basin (lowest point) will be placed.
A-1.10% grade meets a +0.60% grade at station 36+00 and elevation 800.00 ft. The
+0.60 grade then joins a +2.40 grade at station 39+00.
Part A
Determine the elevation at the low point of the curve.
Express your answer in feet to six significant figures.
Elev =
Submit
Part B
VAΣo↓ vec
Request Answer
Determine the station at the low point of the curve.
Submit
O 38+42.763
O 35+40.763
O 36+42.763
O 36+44.763
Request Answer
?
ft
Q2- Find the required area of cut/fill (m2) and Calculate the net volumes (m3) between each two
stations.
The road width value 13
The total road length is 330 m.
Filling shrinkage ratio is 15 %
The road elevation at the C.L of station (0+00) is 10.00 m. with 4 % uphill gradient
RL = Road level, GL = Ground level
Station 6+00
Station 7+00
GL
GL
1.5m
2.0m
RL
2%
6:1
RL
2%
5:1
Chapter 14 Solutions
Traffic and Highway Engineering
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