MECHANISTIC OVERLAY DESIGN PROCEDURES AVAILABLE TO THE DESIGN ENGINEER

This paper is based on the first of a three-volume report on overlay design procedures. The basic report contains a summary of major overlay design procedures documenting their development and conceptual basis, and analyzes their sensitivity to required input data. Contained in this paper is a description of mechanistic overlay design procedures that are available to design engineers. Overlays or resurfacings are used by agencies more often than any other type of rehabilitation technique. This paper was prepared to provide highway engineers with assistance in determining what mechanistic overlay design procedures are available for adoption, implementation, and use by an agency. The full report documents the development and basis of the major overlay design procedures that are in use or are being implemented in the United States at the present time. Contained in this paper is an abbreviated description of the more common mechanistic overlay design procedures.