Bi-axial Geogrids are square meshes of polypropylene (PP) and widely used as subsoil reinforcement. Their prominent characteristic is excellent mechanical properties under intermittent high loading. As a bi-axial mesh strength is equal in both machine and cross direction. As Granular materials are compacted into the apertures of the ID an interlocking effect is achieved. The stiffness of Geogrid allows for load at low strain. Ultimately highway design relies on economic solutions which Geogrid provides, allowing an estimated 40% reduction in granular materials with no less of performance.