The use of geogrid reinforcements has received more attention recently as a means of extending pavement service life, ensuring excellent performance, and lowering service and maintenance costs. Rutting and fatigue cracking are major problems with existing hot mix asphalt (HMA) pavements. The main objective of this study is to investigate the effective position of geogrids under dynamic vehicular loads. The key to obtaining effective performance from geogrids and related products is correct installation. Numerical investigation results for six different possibilities of geogrid reinforcement in the paved road layers have been evaluated. The effective position was decided based upon the predicated horizontal tensile strain, vertical stress reduction, and deformation reduction rate. In this paper, the effects of fiberglass geogrid installation depth rutting and fatigue cracking control have been considered with the finite element method. A finite element analysis will be carried out using Python scripting with 3D ABAQUS version 2021 software in order to conduct a comprehensive study on geogrid installation depth for preventing rutting and fatigue cracking. This study was carried out at six locations of geogrid installation in flexible pavement layers: 1. at the middle of the hot mix asphalt layer; 2. hot mix asphalt-base interface; 3. in the middle of the base layer; 4. base-subbase interface; 5. in the middle of the subbase layer; 6. at the interface between the subbase and the subgrade layer. The result showed that placing geogrid reinforcement at the interface of HMA and base layer led to the highest reduction in tensile strain (fati gue). The highest decrease in vertical deformation occurs when the reinforcement is placed at the interface of the subbase and subgrade layers. Keywords: ABAQUS, Python, Flexible Pavement, Fiberglass Geogrid,