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The first road segment in the new system was officially opened and dedicated on February 24, 1960 and consisted of a portion of the Pontchartrain Expressway in New Orleans. [2] Two months later, the first Interstate Highway shields installed in Louisiana accompanied the opening of a portion of I-20 near Ruston on April 23. [3]
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).
Longest highway in Louisiana. LA 2: 189.490: 304.955 SH 49 west of Trees at the Texas state line: US 65 north of Lake Providence: 1955: current LA 3: 35.705: 57.462 I-20, US 71, and LA 72 in Bossier City: AR 29 at the Arkansas state line north of Plain Dealing: 1955: current LA 4: 164.537: 264.797 US 71 north of Loggy Bayou: LA 605 in Newellton
US 90 enters Louisiana at the Texas line over the Sabine River as part of I-10. Separating at exit 4 and running parallel on the north side of I-10 through Sulphur, before rejoining I-10 east of Westlake, crossing the Calcasieu River, and again splitting from I-10 at exit 31B (running on the south side of I-10) going through Lake Charles as Fruge, West 4th, then East 4th, before leaving town.
Interstate 55 (I-55) is a part of the Interstate Highway System that spans 964.25 miles (1,551.81 km) from LaPlace, Louisiana, to Chicago, Illinois. [2] Within the state of Louisiana, the highway travels 66 miles (106 km) from the national southern terminus at I-10 in LaPlace to the Mississippi state line north of Kentwood .
Interstate 10 (I-10), a major transcontinental Interstate Highway in the Southern United States, runs across the southern part of Louisiana for 274.42 miles (441.64 km) [1] [3] from Texas to Mississippi.
Interstate 49 (I-49) is an Interstate Highway that currently spans 244.021 miles (392.714 km) in a north–south direction in the US state of Louisiana. [1] Currently, I-49 runs from I-10 in Lafayette to the Arkansas state line.
There are 71 primary Interstate Highways in the Interstate Highway System, a network of freeways in the United States. These primary highways are assigned one- or two-digit route numbers, whereas their associated auxiliary Interstate Highways receive three-digit route numbers. Typically, odd-numbered Interstates run south–north, with lower ...