In 1956 President of the United States Dwight Eisenhower signed the Federal-Aid Highway Act. The act provided for creating 41 thousand-mile “National System of Interstate and Defense Highways” that would reduce hazardous roads, ineffective routes, and traffic jams.
Since 1956, the Interstate Highway System has become a meaningful way to move people and transport goods, joining cities crosswise the nation. The animated map below shows how the Interstate Highway System grew over the decades.
The U.S. numbered highway system in numerical order