List of U.S. Highways in Louisiana

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).

U.S. Highways of the Louisiana Highway System

Highway markers from different years: 1928 (left), 1948 (center), 1970–present (right)
System information
Maintained by La DOTD
Length2,598.636 mi (4,182.099 km)
FormedNovember 11, 1926 (1926-11-11) (designated);
February 1928 (signed)
Highway names
US HighwaysU.S. Highway X (US X)
Special routes:U.S. Highway X Business (US X Bus.);
U.S. Highway X Bypass (US X Byp.);
U.S. Highway X Truck (US X Truck)
System links
  • Louisiana State Highway System
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