Practice question

What is the purpose of a crest vertical curve in roadway design?

To transition between two roadway segments where the grade changes from an upgrade to a downgrade (or a steeper upgrade to a flatter one)
To provide a flat transition at the bottom of a valley
To connect a freeway mainline with an exit ramp
To create a superelevated section on a horizontal curve

Answer: A — To transition between two roadway segments where the grade changes from an upgrade to a downgrade (or a steeper upgrade to a flatter one)

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