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A say vertical curve is to be designed to join a -5% to a +2% grade. If the design speed is 40 mph, determine

A say vertical curve is to be designed to join a -5% to a +2% grade. If the design speed is 40 mph, determine the minimum length of the curve that will satisfy all criteria. Assume a perception reaction time = 2.5 sc a=11.2/

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