Blue Highways

Virginia: U.S. Geological Survey, 1994). Least Heat Moon, William, Blue Highways: A Journey Into America, (Boston: Little Brown and Company, 1982). ISBN

威廉·劉易斯·特羅格登（William Least Heat-Moon）則在《藍色公路：進入美國之旅》（Blue Highways: A Journey Into America），一本於1982年出版的書中提出了名稱來源的另一種說法。此說法指出當時有一位移民者說：

Span. Blue Water Bridge Canada. 2008-02-22 [2013-07-30]. （原始内容存档于2012-04-08）.  Christopher J. Bessert. Highways 90 through 99. Michigan Highways. [2011-09-16]

Ontario Department of Highways. Sarnia inset. 1946.  Ontario Road Map (地图). Cartography by C.P. Robins. Ontario Department of Highways. Sarnia inset. 1949

Automobile Blue Book 1. Automobile Blue Books Inc. 1926.  New York State Department of Highways. Report of the State Commissioner of Highways. Albany, New