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2 cards from this section. Quick, good the night before a test.
What is a compound curve?
Think about the shape it forms.
Define a tangent point.
Consider where a road curves into a straight.
What defines a compound curve?
Consider how curves are formed.
True or False: The tangent point is where the curve ends.
Think about where a road curves to become straight.
A road design needs a compound curve that connects two different roads with 25° and 45° angles. Identify the radius needed for this design.
Consider the overall flow and safety of the vehicle.
Design a compound curve with a radius of 150 m and 200 m that transitions between two straights. Calculate all key elements.
Use the relationships between angles and curvature to derive your values.
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