What is the term for the length of superelevation development from zero cross slope to full design superelevation?

The correct term for the length of superelevation development from zero cross slope to full design superelevation is known as superelevation transition. Superelevation is the banking of roadways on horizontal curves to counteract lateral acceleration and provide comfort and safety to vehicles navigating the curve. The superelevation transition gradually increases the cross slope of the pavement from flat (0% cross slope) to the designed slope necessary for the curve, allowing for a smooth change rather than a sudden tilt.

Superelevation runoff, on the other hand, refers typically to the distance over which the superelevation is applied or the transition occurs rather than the development length itself. Camber development and cross slope increase, while related to roadway geometry and drainage, do not specifically describe the process of developing superelevation. Thus, superelevation transition clearly defines the process and distance over which the roadway transitions to the necessary banking degree for vehicles to navigate turns safely.