Louisiana Highway 1

Louisiana Highway 1
LA 1 highlighted in red
Route information
Maintained by Louisiana DOTD
Length	431.877 mi[1] (695.039 km)
Existed	1955 renumbering–present
Tourist routes	National Scenic Byway: Great River Road Louisiana Scenic Byways: Boom or Bust Byway Cane River National Heritage Trail Wetlands Cultural Byway
Major junctions
South end	Dead end at Bayou Rigaud in Grand Isle
Major intersections	Future I-49 / US 90 in Raceland I-10 in Port Allen US 190 west of Baton Rouge I-49 / US 167 in Alexandria US 71 / US 165 in Alexandria I-49 in Boyce US 84 / US 371 west of Coushatta I-20 / US 71 in Shreveport I-220 in Shreveport I-49 north of Shreveport
North end	SH 77 at Texas state line northwest of Rodessa
Location
Country	United States
State	Louisiana
Parishes	Jefferson, Lafourche, Assumption, Ascension, Iberville, West Baton Rouge, Pointe Coupee, Avoyelles, Rapides, Natchitoches, Red River, Caddo
Highway system
Louisiana State Highway System Interstate US State Scenic
← LA 3286 → LA 2

Louisiana Highway 1 (LA 1) is a state highway in Louisiana. At 431.88 miles (695.04 km), it is the longest numbered highway of any class in Louisiana. It runs diagonally across the state, connecting the oil and gas fields near the island of Grand Isle with the northwest corner of the state, north of Shreveport.

The part south of U.S. Highway 90 near Raceland is Corridor 44, a National Highway System High Priority Corridor. From Alexandria to Shreveport, the LA 1 corridor was used for Interstate 49.

Between New Roads, Louisiana, and the interchange with Interstate 49 at Alexandria, Louisiana, LA 1 forms part of the Zachary Taylor Parkway.^[2]