<p>Studies regarding the durability performance of both chemically and mechanically treated soil for road subgrade construction is an interesting area in pavement and geotechnical engineering disciplines. The employment of natural fibers in the reinforcement of pavement materials also results from the excessive settlement and low bearing capacity witnessed in most biopolymerized soils, particularly soft soils. The present study is dedicated to reviewing the efficacy of reinforcing biopolymerized clayey soils with natural fiber for effective pavement subgrade construction. Furthermore, the study also highlights the significance of biopolymers and natural fiber in road infrastructure construction in relation to their ability to enhance strength characteristics, improve performance, and foster the environmental sustainability of the reinforced soil. More importantly, the study also highlights the impact of the interactions of varied proportions of biopolymers and natural fibers on the soft clayey soil during stabilization. Based on findings, this review deduced that the strategic inclusion of biopolymers and natural fibers as pavement subgrade stabilizers promotes durability, efficient resource usage, and environmental well-being in sustainable development.</p> Graphical abstract <p></p>