sentences:  In 1921, the North Carolina Highway System was established, with NC 10, nicknamed the ""Central Highway"," designated on the route between Asheville and Greensboro.By the time US 70 was established, in 1926, and placed on concurrency on all of NC 10, nearly all of the route was either paved or oil-treated.After World War II, the federal government began planning on a new "Interregional Highway" system, as mandated by the Federal-Aid Highway Act of 1944, and released a proposed National System of Interstate Highways in 1947, which included a route that followed loosely to US 70, from the Tennessee state line to Greensboro.