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  1. Interstate Highway System - Wikipedia

  2. The Interstate Highway System ‑ Definition, Purpose & Facts - HISTORY

  3. History of the Interstate Highway System | FHWA

  4. History of the Interstate Highway System - 50th Anniversary ...

  5. Highway History | FHWA - Federal Highway Administration

  6. The Complex History of the U.S. Interstate Highway System

  7. Interstate Highway System | Highway, Eisenhower, Description, …

  8. On the Interstate | National Museum of American History

  9. Original Intent: Purpose of the Interstate System 1954-1956

  10. Ike's Interstates at 50 - National Archives