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SH 77 northwest of Rodessa at the Texas state line 1955: current 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
List of state highways in Louisiana (1–99) List of state highways in Louisiana (100–149) List of state highways in Louisiana (150–199) List of state highways in Louisiana (300–349) List of state highways in Louisiana (350–399) List of state highways in Louisiana (400–449) List of state highways in Louisiana (450–499)
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).
Detailed state-level articles are in the process of being created for the two-digit U.S. Highways in Louisiana. List of state highways in Louisiana. Due to the size and character of the state highway system, individual articles are not needed for every route. Instead, a subset of list articles (typically organized in groups of 50) is used to ...
I-10 remains closed in both directions in Louisiana from the Texas state line to around Baton Rouge, according to the state's road conditions map. Portions of Interstate 55 are also shut down ...
For a time in the 1950s, LA 3260 was designated on departmental maps as LA 190, a rare duplication between a U.S. and state route number after the 1955 Louisiana Highway renumbering. [12] LA 3260 was deleted in 2018 as part of the La DOTD's Road Transfer program. [13] [14] The entire highway was in Hammond, Tangipahoa Parish.
Mississippi state line north of Kentwood: 1960 [8] current North–south route in southeastern Louisiana via Hammond: I-59: 11.48: 18.48 I-10/I-12 in Slidell: Mississippi state line north of Pearl River: 1962 [9] current North–south route in southeastern Louisiana via Slidell I-69 — — Texas state line southwest of Shreveport (undecided)
According to one proposal by the Louisiana Legislative Council, the 16,000 miles (26,000 km) or so which existed in the state system at the time would have been ultimately reduced to around 9,000 miles (14,000 km) through the turnback of all but the most important farm-to-market roads.