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3 cards from this section. Quick, good the night before a test.
Define a compound curve.
Think about what you learned regarding curves in road design.
What is the formula for calculating the average radius of a compound curve?
Consider how you average two numbers.
What is a compound curve?
Think about how roads transition.
True or False: The length of a compound curve is proportional to the deflection angle.
Higher deflection means a longer curve.
Calculate the external distance for a compound curve made with R1 = 300 m and R2 = 450 m if the deflection angle is 60°.
Remember to divide the deflection angle when calculating.
A road section's compound curve has radii of 250 m and 350 m, respectively. Calculate the total length of the curve for a deflection angle of 75°.
Use the length formula and stay mindful about degrees to radians.
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