TenCate Flexible Pavement Design Software is an analysis tool for engineers to design better and more cost-effective flexible paved roadways by incorporating geosynthetics. This will allow the designer to perform flexible pavement Structural Number (SN) calculations based on AASHTO (American Association of State Highway and Transportation Officials) design methods, either with or without geosynthetics. In addition, the designer will be able to calculate material cost savings and also green savings that the addition of a geosynthetic will provide in the design.