What is the primary engineering purpose of applying super-elevation to a highway's horizontal curve, beyond simply aiding vehicle stability?

Super-elevation, also known as banking, is the transverse slope applied to a highway's horizontal curve, where the outer edge of the pavement is raised relative to the inner edge. Beyond simply aiding vehicle stability, its primary engineering purpose is to counteract the centrifugal force experienced by a vehicle as it navigates the curve, thereby minimizing the reliance on lateral friction between the tires and the road surface. Centrifugal force is the apparent outward force that pushes a vehicle towards the outside of a curve.....