The increasing accumulation of plastic waste poses severe environmental challenges, necessitating innovative recycling strategies. This study explores the incorporation of waste plastic into asphalt pavement to enhance its mechanical properties and promote sustainability. Experimental investigations revealed that plastic-modified asphalt exhibits improved Marshall Stability, indirect tensile strength, and rutting resistance, with an optimal plastic content of 6% for maximum performance. The inclusion of plastic enhances the durability of asphalt pavements by reducing moisture susceptibility and increasing fatigue life. Additionally, plastic modification contributes to environmental benefits by reducing plastic waste accumulation and minimizing the reliance on petroleum-based bitumen. Despite these advantages, challenges such as emissions during processing and variations in plastic properties require further study for large-scale implementation. Future research should focus on optimizing mix design and establishing regulatory frameworks for practical adoption. The findings support the sustainable utilization of waste plastic in asphalt pavement, offering economic, environmental, and structural benefits.