An existing vertical curve on a highway joins a +4.4% grade with a -4.4% grade. If the length of the curve is 275 ft, what is the maximum safe speed on this curve? What speed should be posted if 5mph increments are used ? Assume a = 11.2 ft/sec², perception-reaction time = 2.5 sec, and SLL

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An existing vertical curve on a highway joins a +4.4% grade with a -4.4% grade. If the length of the curve is 275 ft, what is the maximum safe speed on this curve? What speed should be posted if 5mph increments are used ? Assume a = 11.2 ft/sec², perception-reaction time = 2.5 sec, and SLL An existing vertical curve on a highway joins a +4.4% grade with a -4.4% grade. If the length of the curve is 275 ft, what is the maximum safe speed on this curve? What speed should be posted if 5mph increments are used ? Assume a = 11.2 ft/sec², perception-reaction time = 2.5 sec, and SLL

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