The U.S. Highway System in Louisiana consists of 2,490.851 miles (4,008.636 km) of mainline highway routes and 107.785 miles (173.463 km) of special routes (both figures including concurrencies) that are constructed and maintained by the Louisiana Department of Transportation and Development (La DOTD).[3]
^ abLouisiana Highway Commission; Hal M. Bourg (July 1, 1935). Official Road Map of Louisiana (Map). Scale not given. Baton Rouge: Louisiana Highway Commission.
^Special Committee on U.S. Route Numbering (October 15, 2011). "Report to the Standing Committee on Highways"(PDF) (Report). Washington, DC: American Association of State Highway and Transportation Officials. Archived from the original(PDF) on October 16, 2017. Retrieved November 5, 2015.
^Special Committee on U.S. Route Numbering (October 29, 2010). "Report to the Standing Committee on Highways"(PDF) (Report). Washington, DC: American Association of State Highway and Transportation Officials. Archived from the original(PDF) on October 16, 2017. Retrieved November 5, 2015.
^ abLouisiana Department of Highways (1966). Louisiana (Map). Scale not given. Baton Rouge: Louisiana Department of Highways.
^ abcdefghLouisiana Department of Highways (June 1, 1963). Louisiana (Map). Scale not given. Baton Rouge: Louisiana Department of Highways.
^"West Bank Link Opens Monday". The Times-Picayune. New Orleans. September 11, 1960. p. 6. ISSN1055-3053.
^Barry, Fred (October 9, 1960). "West Bank Expressway Removes Bottlenecks". The Times-Picayune. New Orleans. p. 6. ISSN1055-3053.
^Special Committee on U.S. Route Numbering (May 4, 2008). "Special Committee on US Route Numbering Decisions" (Report). Washington, DC: American Association of State Highway and Transportation Officials. Archived from the original(MHT) on October 16, 2017. Retrieved November 5, 2015.
^ abcdeLouisiana Department of Highways (1947). Louisiana Highways (Map). Scale not given. Baton Rouge: Louisiana Department of Highways.
^ abcdefgLouisiana Department of Highways (September 1, 1951). Louisiana Highways (Map). Scale not given. Baton Rouge: Louisiana Department of Highways.
^Special Committee on U.S. Route Numbering (October 3, 1981). "Route Numbering Committee Agenda" (Report). Washington, DC: American Association of State Highway and Transportation Officials. Retrieved November 5, 2015 – via Wikisource.
^Gallup Map and Supply (1937). Louisiana Info-Map (Map). Gulf Oil.
^H.M. Gousha (1939). Road Map of Louisiana (Map). Scale not given. Baton Rouge: Tourist Bureau, Louisiana Department of Commerce and Industry.
^ abLouisiana Department of Highways (July 1, 1956). Louisiana Highways (Map). Scale not given. Baton Rouge: Louisiana Department of Highways.
^Louisiana Department of Highways (July 1, 1955). Louisiana Highways: Interim Road Map (Map). Scale not given. Baton Rouge: Louisiana Department of Highways.