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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 ]
Louisiana Highway 728 (LA 728) is a collection of two state highways in Walroy south of Lafayette in Lafayette Parish. Both highways are part of Hugh Wallis Road and generally run parallel to US 90 and a BNSF railroad. LA 728-2 (0.37 miles or 0.60 kilometres) begins at a curve tangent and heads north-northwest past a hotel and a few homes.
Since 2008, La DOTD has been replacing the green-and-white state highway markers with a black-and-white version using the same design. [2] The new shields have a black background, white silhouette, black letters and numbers, and no frame outline (see photo below for comparison). Highway names; State: Louisiana Highway X (LA X) Special routes:
In the mid-1970s, the Federal Highway Administration (FHWA) approved an Interstate Highway to run between I-10 and I-20, beginning at I-10 in Lafayette and ending at I-20 in Shreveport. The mileage was gained from mileage released from other highways the states did not build as well as 153 miles (246 km) from a supplemental reserve.
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.
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).
From the west, LA 6 begins at the Texas state line, continuing the route of Texas State Highway 21 (SH 21) midway across a bridge over the Toledo Bend Reservoir.After heading northeast into Sabine Parish, Louisiana for 2.4 miles (3.9 km), LA 6 reaches land and curves to the east for another 3.6 miles (5.8 km) where it intersects LA 191 south of Zwolle.
Louisiana Highway 948 (LA 948) runs 0.35 miles (0.56 km) in an east–west direction along Highland Road from the junction of US 61 and LA 42 to a junction with LA 73 southeast of Baton Rouge. [42] The route's mileposts increase from the eastern end contrary to common practice. It is an undivided two-lane highway for its entire length.