Problem:
An equal tangent sag equal tangent vertical curve (with a negative initial and a positive final grade). Is designed for 55 mi/h. The PVI is at station 240+00 and elevation122ft. The PVT is at station 242+30 and elevation 127.75.
Required:
Question: What is the station and elevation of the lowest point on the curve?
Note: Be sure to show how you arrived at your answer.