Cross slope

Cross slope, cross fall or camber is a geometric feature of pavement surfaces: the transverse slope with respect to the horizon.

Cross slope is provided to provide a drainage gradient so that water will run off the surface to a drainage system such as a street gutter or ditch.

In horizontal curves, the cross slope is banked into superelevation to reduce steering effort and lateral force required to go around the curve.

[2] If the cross slope magnitude oscillates within 1–25 metres (3–82 ft), the body and payload of high (heavy) vehicles will experience high roll and lateral vibration.

Cross slope is usually expressed as a percentage: Cross slope is the angle around a vertical axis between: Typical values range from 2 percent for straight segments to 10 percent for sharp superelevated curves.