Weak soil presents significant challenges in construction, necessitating specialized methods for ensuring structural stability. Techniques such as mechanical stabilization, admixture stabilization with lime or cement, and removal and replacement of weak soil are employed, albeit with considerable costs and quality control issues. This study evaluates the effectiveness of geogrid reinforcement in road pavement using 3D finite element analysis. The objectives include optimizing geosynthetic placement, determining the optimal base thickness, and comparing strain responses under both static and dynamic loads. The study integrates geogrids for structural reinforcement and geotextile filters for enhancing durability and cost-effectiveness. Dynamic loading exerts a notable influence on reinforced pavement performance, with higher vehicle speeds reducing stresses and displacements, thereby improving pavement response. Loading frequency has minimal impact, and viscoelastic strain responses are observed under dynamic conditions. Vehicle speed variations significantly affect pavement deformations, illustrating the complexity of performance dynamics. Despite gaps in understanding optimal geogrid dimensions and material synergies, rigorous data collection and comprehensive modeling support performance evaluations, guiding the design of resilient and long-lasting road infrastructure.