The Evolution of the U.S. Interstate Highway System

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.

The national system of interstate and defense highways

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 Growth of the US Interstate Highway System

The U.S. numbered highway system in numerical order

The USA numbered highway system in numerical order
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