A crest vertical curve is to be designed to join a +2% grade with a -2% grade at a section of a two-lane highway. Determine the minimum length of the curve if the design speed of the highway is 60 mph and SCL, Assume that a = 9, 3uft and that the perception reaction time is 2.5.sec.

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A crest vertical curve is to be designed to join a +2% grade with a -2% grade at a section of a two-lane highway. Determine the minimum length of the curve if the design speed of the highway is 60 mph and SCL, Assume that a = 9, 3uft and that the perception reaction time is 2.5.sec. sed A crest vertical curve is to be designed to join a +2% grade with a -2% grade at a section of a two-lane highway. Determine the minimum length of the curve if the design speed of the highway is 60 mph and SCL, Assume that a = 9, 3uft and that the perception reaction time is 2.5.sec. sed

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