Louisiana Highway 45

Louisiana Highway 45
Route of LA 45 highlighted in red
Route information
Maintained by Louisiana DOTD
Length:	22.081 mi (35.536 km)
Existed:	1955 renumbering – present
Major junctions
South end:	Dead end at Bayou Barataria in Lafitte
	LA 3134 in Jean Lafitte LA 3134 in Estelle US 90 Bus. in Marrero
North end:	LA 18 in Marrero
Location
Parishes:	Jefferson
Highway system
Louisiana Highway System Interstate US State Scenic ← LA 44 LA 46 →

Louisiana Highway 45 (LA 45) is a state highway located in Jefferson Parish, Louisiana. It runs 22.08 miles (35.53 km) in a north–south direction from a dead end at Bayou Barataria in Lafitte to a junction with LA 18 in Marrero.

The route connects Marrero, an unincorporated suburb of New Orleans, with several small communities located along Bayou Barataria, including the town of Jean Lafitte. It also provides access to the Barataria Unit of the Jean Lafitte National Historical Park and Preserve, a protected area of environmental and cultural significance which, among its many functions, features walking trails through its vast swamps and marshes.

Roughly halfway along its route, LA 45 and LA 3134 share a high-level bridge across a section of Bayou Barataria that serves as a link in the Gulf Intracoastal Waterway. Near its northern terminus, LA 45 has an interchange with U.S. Highway 90 Business (US 90 Bus.), an elevated freeway traversing the communities of Jefferson Parish located on the west bank of the Mississippi River.