The Dwight D. Eisenhower National System of Interstate and Defense Highways is a network of highways in the United States, established in 1956. It was designed to improve transportation efficiency and enhance national defense by facilitating the movement of military troops and equipment. The system spans over 47,000 miles, connecting major cities and regions across the country. Named after President Dwight D. Eisenhower, who championed the initiative, the interstate system has significantly impacted American society. It has contributed to economic growth, increased accessibility, and transformed travel patterns, making it easier for people and goods to move across long distances.