The sight distance of a sag vertical sag curve equal to 120 meters. if the tangent grades of the curve are -4% and +5%. Compute the length of the curve. Compute the design speed of the vertical sag curve. Compute the minimum radius of the sag vertical curve.

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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.