This article is about the section of Interstate 55 in Louisiana. For the entire route, see Interstate 55.
Interstate 55
I-55 highlighted in red
Route information
Maintained by Louisiana DOTD
Length
66.086 mi[1][a] (106.355 km)
Existed
1960–present
Tourist routes
Louisiana Scenic Byway:
Southern Swamps Byway
NHS
Entire route
Major junctions
South end
I-10 in LaPlace
Major intersections
US 51 in Frenier
US 51 in Hammond
I-12 in Hammond
US 190 in Hammond
North end
I-55 at Mississippi state line north of Kentwood
Location
Country
United States
State
Louisiana
Parishes
St. John the Baptist, Tangipahoa
Highway system
Interstate Highway System
Main
Auxiliary
Suffixed
Business
Future
Louisiana State Highway System
Interstate
US
State
Scenic
← LA 54
→ LA 55
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.[1]
The route is located in the southeastern portion of Louisiana and parallels the older U.S. Highway 51 (US 51) corridor. While passing through the city of Hammond, I-55 intersects two of the state's major east–west routes, I-12 and US 190. It also serves the smaller city of Ponchatoula, as well as the towns of Amite City and Kentwood.
I-55 is a major highway through the New Orleans metropolitan area, the city being located 20 miles (32 km) east of the junction between I-10 and I-55. It also serves as an important hurricane evacuation route for the region. I-55 was opened in several stages beginning in 1960 with a bypass of Ponchatoula and Hammond. The southern 23 miles (37 km) of I-55, consisting of a twin-span viaduct through the Manchac swamp, was completed in 1979 and is one of the longest bridges in the world.
^ ab"La DOTD GIS Data". Louisiana Department of Transportation and Development. September 2015. Retrieved May 2, 2017.
^ ab"FHWA Route Log and Finder List / Table 1: Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways as of December 31, 2016". Federal Highway Administration. February 22, 2017. Retrieved May 2, 2017.
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Global Information
I-10 in LaPlace
I-55 at Mississippi state line north of Kentwood
