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A 740 ft. long vertical curve is needed for a section of highway with an approaching...

A 740 ft. long vertical curve is needed for a section of highway with an approaching grade of -4.2% and a leaving grade of +1.6%. The station (in feet) of the Vertical Point of Intersection (VPI) is 16+70 and the elevation of the VPI is 609ft.

The station of the beginning of the curve is closest to:

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