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A vertical curve is formed by joining two grades 6% to a -2% grade. If the...

A vertical curve is formed by joining two grades 6% to a -2% grade. If the design speed is 55 mph, determine the minimum length of the curve that will satisfy all applicable criteria.

Assume a = 11.2 ft/s2 and perception-reaction time as 2.5 sec.

Note: If the curve is a sag curve, ignore the drainage criterion

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