United States Interstate Highway System

The United States Interstate Highway System is a network of controlled-access highways designed for high-speed travel across the country. Established in 1956, it connects major cities and regions, facilitating commerce and travel. Interstates are numbered, with odd numbers typically running north-south and even numbers east-west. Designed for efficiency and safety, these highways have fewer intersections and traffic lights, allowing for smooth, long-distance travel. The system has significantly contributed to economic growth and mobility by providing reliable routes for goods and people across the nation.