18 - Vertical Alignment - 2
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Practice Questions
Test your understanding with targeted questions
What characterizes a valley curve?
💡 Hint: Think about the shape of a 'U'.
What factor greatly affects visibility on valley curves at night?
💡 Hint: What do drivers depend on when driving at night?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What type of curve is a valley curve?
💡 Hint: Think about the shape that resembles a valley.
True or False: Valley curves are only a concern during the daytime.
💡 Hint: Consider how visibility changes at different times of day.
1 more question available
Challenge Problems
Push your limits with advanced challenges
A road with a descending gradient of 1 in 20 meets a flat section. Determine the length of the valley curve needed to ensure comfort at 70 km/h with SSD of 150 m under nighttime conditions.
💡 Hint: Review both comfort rate and adequate sight distance calculations.
Analyze the impact of an improperly designed valley curve that ignores minimum sight distance at night. What accidents might occur, and how can they be prevented?
💡 Hint: Consider referencing visibility distances and headlight capabilities.
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