Calculate Underpass Sight Distance For Sag Vertical Curve Design| Solved Problem
In this video we will learn how to calculate overpass and underpass sight distance for sag vertical curve design.
Question: An equal-tangent sag curve has an initial grade of 4.0%, a final grade of +3.0%, and a design speed of 70 mph. An overpass is being placed directly over the PVI of this curve. At what height above the roadway should the bottom of this sign be placed?
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