17.3.3.1 - Case a. Length of summit curve greater than sight distance
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Practice Questions
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What is a summit curve?
💡 Hint: Think about how hills transition in roads.
Define sight distance.
💡 Hint: Consider how far ahead you need to see while driving safely.
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Interactive Quizzes
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What is a summit curve?
💡 Hint: Think about how a road might change when going uphill.
True or False: The driver's eye height impacts sight distance calculations.
💡 Hint: Consider how tall objects can block your view.
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Challenge Problems
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A road has a driver's eye height of 1.2 meters and an obstruction of 0.3 meters. Calculate the length of the summit curve if the sight distance needed is 120 meters.
💡 Hint: Refer to the relationships established in case 'a' for calculation.
Given two gradients, n1 = +5% and n2 = -3%, derive the summit curve's length when the sight distance is 150 meters.
💡 Hint: Focus on understanding how to apply the equations derived from the section.
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