29 mar 1837 año - National Road
Descripción:
 National Road  was the first major highway in the US.The 620-mile road connected the Potomac and Ohio Rivers.It was the second US road started construction by John Loudon McAdam. 
Añadido al timeline:
fecha:
29 mar 1837 año
Ahora mismo
 ~ 188 years ago 
Fotos:
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