What was the national road made out of?

Answer 1

The National Road, also known as the Cumberland Road, was primarily constructed using materials like gravel, stone, and clay. It featured a layered structure, with larger stones at the base for stability and smaller gravel on top to create a smoother surface. This construction aimed to facilitate transportation and improve access across the Appalachian Mountains in the early 19th century. The road played a crucial role in westward expansion in the United States.