A highway is being designed in accordance to AASHTO guidelines with a 60-km/h design speed, and at one section, an equal-tangent vertical curve must be designed to connect grades of +3.6%and -1.4%. Determine the minimum length of curve necessary to meet SSD requirements. (Do not use the shortcut (method 130 m 147 m 57.3 m O 42 m O

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