An unsymmetrical vertical parabolic curve of a certain highway with a length of 140m has its vertex V at station 4+300 and elevation 56.00m. The back tangent has a grade of 8% and a length of 90m and its forward tangent with a -5% grade and a length of 50m. Compute the elevations of the curve at each 10-m stationing and tabulate the results.

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Curve setting

A curve is a turn that is provided horizontally or vertically in the design of highways, railways, and runways. A curve connects two straight lines that are separated by the deflection angle. It helps to change the direction and alignment of the highways, railway tracks, and runways. Therefore, the gradual change in their alignment is made by using a curve to provide comfort to the passengers and this also provides an easy turn to change the direction of the moving vehicle.