The research addresses the application of tire granular rubber as an innovative technique to improve subgrade properties in natural soils. The objective of the research was to determine how the use of tire granular rubber influences subgrade stabilization. The study focuses on analyzing how this addition affects the physical and mechanical characteristics of the soil, examines in detail the stabilization process, evaluating the strength, compressibility and behavior of the soil modified with granular rubber. Specific tests and trials are carried out to quantify and compare the properties of the natural soil and the stabilized soil, providing key data for decision-making in infrastructure design and construction.