An embankment is a raised structure made of earth, stone, or other materials, designed to hold back water or support a roadway or railway. It is commonly used in flood control, creating barriers along rivers or coastlines to prevent flooding in adjacent areas. Embankments can also serve as foundations for transportation systems, such as roads and railways, providing a stable surface for vehicles and trains. They are often constructed with careful engineering to ensure stability and durability, and may include drainage systems to manage water flow and prevent erosion.