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The Interstate Highway System in Louisiana consists of 933.84 miles (1,502.87 km) [4] of freeways constructed and maintained by the Louisiana Department of Transportation and Development (La DOTD). The system was authorized on June 29, 1956 when President Dwight D. Eisenhower signed into law the Federal Aid Highway Act of 1956 . [ 1 ]
Interstate 20 (I-20) is a part of the Interstate Highway System that spans 1,539.38 miles (2,477.39 km) from Reeves County, Texas, to Florence, South Carolina. [2] Within the state of Louisiana, the highway travels 189.84 miles (305.52 km) from the Texas state line west of Greenwood to the Mississippi River, [1] which it crosses into Vicksburg, Mississippi.
Map of the United States with Louisiana highlighted. Louisiana is a state located in the Southern United States.According to the 2020 United States census, Louisiana is the 25th most populous state with 4,657,757 inhabitants and the 33rd largest by land area spanning 43,203.90 square miles (111,897.6 km 2) of land. [1]
Planning is ongoing for a proposed extension of I-69 southward from its original terminus in Indiana through Texas to the United States–Mexico border. [6] If complete as planned, I-69 will extend about 650 miles (1,050 km) across Texas, from the Louisiana state line in the Texarkana–Shreveport area to South Texas. [7]
Arkansas state line at Ida: 1926 [1] current US 79: 88.246: 142.018 Texas state line southwest of Greenwood: Arkansas state line north of Haynesville: 1935 [6] current US 80: 199.850: 321.627 Texas state line west of Greenwood: Mississippi state line at Vicksburg, MS: 1926 [1] current US 84: 182.851: 294.270 Texas state line at Logansport
The major cities that I-20 connects to include Dallas-Fort Worth, Texas; Shreveport, Louisiana; Jackson, Mississippi; Birmingham, Alabama; Atlanta, Georgia; and Columbia, South Carolina. From its terminus at I-95, the highway continues about two miles (3.2 km) eastward into the city of Florence as I-20 Business (I-20 Bus.).
In addition, the two major bridges on the route in Calcasieu Parish between the Texas state line and Lake Charles were built for US 90 in the early 1950s and retrofitted for I-10 traffic. Sections of I-10 through rural areas and/or those sections already served adequately by existing highways, such as Airline Highway (US 61) between Baton Rouge ...
The Texas State Highway system was established in 1917 to create a structured network of roads that would enhance connectivity and support economic development across the state. The initial system included 22 state highways, many of which followed pre-existing trails and trade routes.