task $99===$What fundamental theories serve as the bedrock for civil engineering practices? How do principles of mechanics, material science, and fluid dynamics underpin the design and construction of infrastructure? Explore the role of structural analysis in ensuring the stability and safety of bridges, buildings, and dams. How does soil mechanics inform foundation design, considering factors like bearing capacity and settlement? Additionally, delve into the principles of transportation engineering, including traffic flow theory and pavement design, crucial for efficient and durable transportation networks. How do these theoretical frameworks integrate with practical considerations to address challenges in urban development, environmental sustainability, and disaster resilience?