Factors affecting vehicle skids : a basis for wet weather speed zoning.

This report includes an assimilation of findings from various related skid research efforts to form a basis for equating the available friction at a site to the expected friction demand for selected maneuvers. The report presents curves to determine the critical speed for hydroplaning; stopping, cornering, passing, and emergency correction maneuvers; and combined maneuvers. A process is recommended by which wet weather speed zoning may be implemented at selected sites. A design process to establish wet weather speed limits is discussed. (See also B 2723).