An equal-tangent crest vertical curve connects a +3.2% and a -1.1% grade. The PVI is atstation 98+20.

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Question:

An equal-tangent crest vertical curve connects a +3.2% and a -1.1% grade. The PVI is atstation 98+20. Due to drainage considerations, the highest point of the curve is at station100+79.35. Determine the station of the PVC and PVT, and the design speed of the curve.