. "400"^^ . "The National Highway System is a network of over 400 paved roads that span all across Antarctica. Although quite big, it still has expansion plans with five new highways as of December 2009."@en . . "Antarctica"@en . "The National Highway System is a network of over 400 paved roads that span all across Antarctica. Although quite big, it still has expansion plans with five new highways as of December 2009."@en . "See Inhabitants"@en . . . . "National Highway System"@en . . "Network of highways. paved"@en . . "National Highway System"@en .