2.7.2 - Elements of a vertical parabolic curve
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Practice Questions
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What is a vertical curve?
💡 Hint: Think about the connection between grades.
Define a summit curve.
💡 Hint: What happens to the road at the top?
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Interactive Quizzes
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What is a vertical curve primarily used for?
💡 Hint: Think about what happens when grades change.
True or False: A valley curve has upward convexity.
💡 Hint: Consider the shape of both curve types.
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Challenge Problems
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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%.
💡 Hint: Use the change in grade divided by the rate of change.
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.
💡 Hint: Remember to calculate based on allowed changes.
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