How does the implementation of advanced construction materials and techniques impact the overall lifecycle cost and sustainability of large$-$scale civil engineering projects, particularly in terms of energy efficiency, maintenance requirements, and environmental footprint? Discuss the challenges and benefits associated with integrating these modern materials and methods into existing construction practices, considering factors such as cost$-$benefit analysis, long$-$term performance, regulatory standards, and stakeholder acceptance. Additionally, elaborate on the role of technological advancements, such as Building Information Modeling $($BIM$)$ and smart infrastructure, in facilitating the adoption of these materials and techniques, and how they contribute to the optimization of resource allocation and project outcomes.