19.1 - A 1% grade meets a +2.0% grade
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Practice Questions
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What is a grade in road design?
💡 Hint: Think about how steep a hill is.
What does chainage measure?
💡 Hint: Consider how we mark distances on roads.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the purpose of calculating tangent lengths in road design?
💡 Hint: Think about transitions when driving.
True or False: The chainage is measured in kilometers.
💡 Hint: Consider common road measurement units.
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Challenge Problems
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If a highway section has a gradient change from -2% to +3%, explain the design considerations for setting out smooth curves and calculate the required curve lengths with a radius of 250 m.
💡 Hint: Remember to account for safety, vehicle speed, and visibility!
Design a road that connects a -1% grade to a +4% grade. Calculate the total length of the vertical curve needed and provide a tabulated summary of how chainage changes with distance on the curve.
💡 Hint: Break it down: consider each segment as you go!
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