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Interstate Highway System - Wikipedia
The Interstate Highway System ‑ Definition, Purpose & Facts - HISTORY
History of the Interstate Highway System | FHWA
History of the Interstate Highway System - 50th Anniversary ...
Highway History | FHWA - Federal Highway Administration
The Complex History of the U.S. Interstate Highway System
Interstate Highway System | Highway, Eisenhower, Description, …
On the Interstate | National Museum of American History
Original Intent: Purpose of the Interstate System 1954-1956
Ike's Interstates at 50 - National Archives