18.2.1 - Design Considerations
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Practice Questions
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What is a valley curve?
💡 Hint: Think about the shape it forms due to two gradients.
Why is headlight distance important?
💡 Hint: What do we rely on at night when driving?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary function of a valley curve?
💡 Hint: Consider the purpose of smooth transitions in driving.
True or False: The stopping sight distance is not a factor in valley curve design.
💡 Hint: Think about safety when it comes to stopping distances.
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Challenge Problems
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Given a design speed of 70 km/h and a required stopping sight distance of 120 m, calculate the length of the valley curve using comfort criteria.
💡 Hint: Remember to apply the values properly into the formula.
If a valley curve has an inappropriate radius affecting the stopping sight distance, discuss the likely outcomes and safety implications.
💡 Hint: Think about how a driver's ability to see in advance affects their reaction time.
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