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2 cards from this section. Quick, good the night before a test.
What is a valley curve?
Think about the shape of a valley.
What does SSD stand for in road design?
What do you need to safely stop your vehicle?
What does a valley curve help achieve in road design?
Think about the driving experience on curves.
True or False: Comfort criteria focus solely on the length of the curve.
Remember the factors involved in comfort.
You have a valley curve with descending gradient n = 1 in 20 and ascending n = 1 in 35. For a design speed of 100 km/h, calculate L considering both comfort and safety criteria.
Do not forget to evaluate both cases; which conditions govern your final answer?
Given a scenario where poor visibility conditions lead to frequent accidents at night, analyze how you would redesign the valley curve with a focus on safety.
How does sight distance adapt to curve length?
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