Published Paper Details:

Abstract: The mechanistic-empirical (M-E) pavement design approach has gained significant importance in modern highway engineering due to its ability to realistically predict pavement performance under varying traffic and material conditions. Unlike conventional empirical methods, the mechanistic-empirical approach integrates mechanistic principles of stress-strain analysis with empirical performance models to evaluate pavement behavior more accurately. The primary objective of this study is to evaluate the structural performance of flexible pavements using the mechanistic-empirical design approach with respect to critical distress parameters such as fatigue cracking and rutting. The methodology involves modelling a typical flexible pavement structure with defined material properties and traffic loading conditions. Pavement responses, including tensile strain at the bottom of the bituminous layer and compressive strain at the top of the subgrade, are computed using mechanistic analysis tools. These responses are then used in empirical transfer functions to predict pavement service life and performance. The effects of traffic loading and layer properties on pavement distress are also examined. The results indicate that the mechanistic-empirical approach provides a more rational and reliable assessment of pavement performance compared to traditional empirical design methods. It enables better prediction of pavement life and helps in optimizing pavement layer thickness for improved durability. The study concludes that mechanistic-empirical pavement design is an effective and practical approach for performance-based pavement evaluation and can significantly enhance the reliability of flexible pavement design.