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National Road - Wikipedia
National Road | History, Map, & Facts | Britannica
The National Road | FHWA - Federal Highway Administration
The National Road – First Highway in America - Legends of America
The National Road - U.S. National Park Service
The Cumberland Road - National Geographic Society
Traveling on the National Road - U.S. National Park Service
The Historic National Road: America's First Highway - Visit …
National Road: America’s First Interstate - HistoryNet
History of the Road - National Road Heritage Foundation