The civil engineering project focused on constructing retaining walls to support a main road, involving several complex elements to ensure structural stability and efficiency. The primary method employed on site was a nail piling wall system, chosen for its ability to provide robust support and enhance structural efficiency in challenging conditions. This nail piling wall system was particularly effective in areas where increased stability was essential, offering a versatile and strong solution to retain soil and prevent erosion. In less complex areas of the project, vertical piles were used. These provided sufficient support with simpler installation processes, balancing the need for efficiency and effectiveness. The combination of nail piling and vertical piles allowed the project to address varying site conditions effectively, ensuring the main road remained securely supported. This strategic use of different piling techniques resulted in a well-engineered and reliable retaining wall system, crucial for the safety and longevity of the main road infrastructure.