The stopping sight distance of the parabolic curve is 135m. The curve has a back tangent grade of 2% and forward tangent grade of -3% intersection at station 10+221 and elevation 200m. The height of the driver’s eye is 1.4m and that of the obstruction is 0.15m. Compute the length of the curve and the elevation of the highest point of the 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.