List of state highways in Louisiana

Louisiana State Highways
State highway markers for different years: 1955 (left), 1990 (center), 2008–present (right)
System information
Length16,698.41 mi (26,873.49 km)
Formed1955 renumbering
NotesSince 2008, La DOTD has been replacing the green-and-white state highway markers with a black-and-white version using the same design. The new shields have a black background, white silhouette, black letters and numbers, and no frame outline (see photo below for comparison).
Highway names
StateLouisiana Highway X (LA X)
Special routes:Louisiana Highway X Alternate (LA X Alt.);
Louisiana Highway X Business (LA X Bus.);
Louisiana Highway X Bypass (LA X Byp.);
Louisiana Highway X Spur (LA X Spur);
Louisiana Highway X Truck (LA X Truck)
System links
  • Louisiana State Highway System

The state highways in the U.S. state of Louisiana are owned and maintained by the Louisiana Department of Transportation and Development (La DOTD).

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