The Federal Aviation Administration is in the process of developing advanced tools for the design and analysis of airfield pavements. The primary objectives of this project are to evaluate current design procedures utilizing the powerful 3-D nonlinear finite element analysis technique and realistic material models and to make recommendations toward the feasibility of incorporating such a tool in future design procedures. The present scope of the work is focused on the analysis of flexible (asphaltic) overlays placed on either flexible or rigid bases.