Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 7, Problem 17P
To determine
Main deficiencies of multi leg intersections and using suitable diagram to show how we can correct these deficiencies.
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Referring to the vertical curve below, a -2% grade meets a 4.8% grade at the point of vertical intersection (PVI).
The vertical curve length is 625 ft.
What is the horizontal distance from the low point to PVC?
(Round to the nearest foot and fill in the blank with a number only.)
-G₁
PVC
PVI
L
PVT
+ G₂
During your internship, your supervisor asked you to design a horizontal curve with a 24-degree deflection angle for a two-lane road with 12-ft lanes. The design speed is 65 mi/h, and superelevation is limited to 4%. The point of intersection (PI) is located at 825+20, and the roadway is on level terrain. Design the horizontal curve.
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.
Chapter 7 Solutions
Traffic and Highway Engineering
Ch. 7 - Prob. 1PCh. 7 - Prob. 2PCh. 7 - Prob. 3PCh. 7 - Prob. 4PCh. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10P
Ch. 7 - Prob. 11PCh. 7 - Prob. 12PCh. 7 - Prob. 13PCh. 7 - Prob. 14PCh. 7 - Prob. 15PCh. 7 - Prob. 16PCh. 7 - Prob. 17PCh. 7 - Prob. 18PCh. 7 - Prob. 19PCh. 7 - Prob. 20PCh. 7 - Prob. 21PCh. 7 - Prob. 22PCh. 7 - Prob. 23PCh. 7 - Prob. 24PCh. 7 - Prob. 25PCh. 7 - Prob. 26PCh. 7 - Prob. 27PCh. 7 - Prob. 28P
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