A circular curve of 80curvature is to be 6m wide on tangents and 0.75 m wide along the main part of the curve. The PC is at the station 5+100 and widening is to be completed at station 5+115. Determine the radius of the approach curve at the inner edge.

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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.