Wet mix macadam (WMM) is an important component in road construction, offering a strong foundation for highways, runways, and other paved surfaces. This research project explores innovative approaches to enhance the strength and performance of WMM by incorporating supplementary materials such as fly ash, rice husk, and polypropylene fiber as partial replacements for moorum. The study employs California bearing ratio (CBR) tests as a standardized method to evaluate the mechanical properties of the WMM mixtures. Initially, a baseline CBR test is conducted on a sample consisting of only moorum, establishing a reference point for comparison. First, we replace various proportion of FA with moorum and perform California bearing ratio (CBR) tests. From this, the combination with the highest CBR value is used for further testing. The selected combination is then combined with various proportions of RHA. The combination with highest CBR value is used for further testing. Further testing includes adding different amounts of PPF to the mixture. The aim of this process is to find the most effective material combination for improving the durability and strength of WMM. Through this comprehensive experimental approach, the research aims to assess the impact of these additives on important engineering parameters such as strength, stability, and durability of the WMM mixtures. The results of this research have important applications in civil engineering, especially in areas where moorum is easily found but might not be the best for building. By using additional materials effectively, this study aims to encourage the use of eco-friendly and cost-effective methods in road construction, promoting sustainability and strength in infrastructure development.