Civil Engineering PE

Answer: B - “Peak” is not a type of vertical roadway curve. Vertical curves, which are used to prevent abrupt vertical changes, can be classified two different ways. The first way is based on the location of the vertex of the curve with respect to the beginning and ending of the curve (symmetrical or asymmetrical). The second classification is based on the grades leading into and away from the vertical curve (sag or crest). The equation used to solve unknown dimensions and elevations of vertical curves is the parabolic formula.