Abstract- Flexible pavement plays a crucial role in modern transportation infrastructure due to its cost-effectiveness, adaptability, and ease of maintenance. With increasing traffic loads, environmental challenges, and material scarcity, there is a growing need for improved design methodologies and effective quality control management. This review paper presents a comprehensive analysis of previous research studies related to flexible pavement design, material innovations, sustainability approaches, and quality control practices. A total of 30 research papers were critically reviewed to understand the evolution of pavement design techniques, including CBR, GI, IRC, mechanistic–empirical methods, and software-based approaches. The study also explores the use of waste materials such as plastic, recycled aggregates, RAP, and industrial by-products in enhancing pavement performance. Furthermore, the importance of quality control management, non-destructive testing, and lifecycle assessment is highlighted. Based on the review, key research gaps have been identified, particularly in the integration of sustainability, real-time quality monitoring, and long-term performance evaluation. The paper concludes by emphasizing the need for a holistic and integrated approach to flexible pavement design that combines advanced materials, modern analytical tools, and effective quality control systems to ensure durable and sustainable road infrastructure.
Labhade et al. (Mon,) studied this question.
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