a multi - axial geogrid possesses a series of interconnected strands or ribs that are arranged along at least two different axes within the plane of the structure . the strands or ribs have an aspect ratio , defined as the ratio of the thickness to width , of greater than 1 . 0 , thickness being the direction normal to the plane of the structure . the geogrid can be manufactured by modifying the process parameters in order to create high aspect ratio ribs , using any of the various known methods for producing geogrids . a reinforced civil engineering structure , and method therefor , is formed by embedding in soil one or more horizontal layers of geogrid having high aspect ratio ribs . the reinforced structure shows improved rutting performance when subjected to vehicular traffic .