Practice Elements Of A Vertical Parabolic Curve (2.7.2)

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8 questions

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6 sample questions

Question 1.
What is a vertical curve?
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Think about the connection between grades.
Question 2.
Define a summit curve.
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What happens to the road at the top?
3Question 3.
What is a vertical curve primarily used for?
- To connect two roads
- To provide smooth transitions between grades
- To increase speed limits
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Think about what happens when grades change.
4Question 4.
True or False: A valley curve has upward convexity.
- True
- False
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Consider the shape of both curve types.
Question 5.
Given a roadway with grades of +2% to -1.5%, calculate the length of the vertical curve required if the rate of change is 0.05%.
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Use the change in grade divided by the rate of change.
Question 6.
Design a vertical curve with a gradient change from a +4% to -3% over a distance of 120 m. Find the length of the curve required.
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Remember to calculate based on allowed changes.

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