The objectives of this study are to investigate and evaluate the benefits of inclusion of geogrids in two types of geosynthetic reinforced soil/aggregate structures—reinforced soil foundations (RSF) and reinforced base aggregate in flexible pavements, thus shedding the light on the design of these reinforced structures. Two different finite element models were developed using ABAQUS software. The first model was used to investigate the bearing capacity and settlement of RSF and to perform 

parametric study on the effect of different design parameters on the performance of RSF. The second model was used to analyze the performance of geogrid reinforced bases in flexible pavement in terms of surface rutting, which was also used to perform parametric study on the 

effect of different design parameters on the performance of reinforced pavements. Based on the results of finite element analyses, multiple regression models were developed to estimate the benefit of reinforced geomaterial structures under different combination of design parameters.