Louisiana Highway 59 is a north–south state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 in Louisiana

Louisiana

Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...

 that serves St. Tammany Parish. It spans 11.75 miles (18.9 km) in a south to north direction. It is known locally as Girod Street, Level Street, Maple Street, and Range Line Road throughout its run.

Route description

From the south, LA 59 (Girod Street) begins at an intersection with US 190 (Florida Street) and LA 1087

Louisiana Highway 1087

Louisiana Highway 1087 is a state highway in Louisiana that serves St. Tammany Parish. It spans in a southwest to northeast direction. It is known locally as Monroe Street and Girod Street.-Route description:...

 (Girod Street south of US 190) in Mandeville. Heading north, it intersects LA 1088

Louisiana Highway 1087

Louisiana Highway 1087 is a state highway in Louisiana that serves St. Tammany Parish. It spans in a southwest to northeast direction. It is known locally as Monroe Street and Girod Street.-Route description:...

 before meeting Interstate 12

Interstate 12

Interstate 12 is an intrastate Interstate Highway located entirely within the state of Louisiana. I-12 starts in Baton Rouge at Interstate 10, and travels along the North Shore of Lake Pontchartrain before ending at the intersection of Interstate 10 and Interstate 59 near Slidell...

 at a diamond interchange (Exit 65).
Continuing northward, the highway turns east as it enters Abita Springs and becomes Level Street. Shortly thereafter, it intersects LA 36

Louisiana Highway 36

Louisiana Highway 36 is a state highway in Louisiana that serves St. Tammany Parish. It spans and is bannered east/west.-Route description:...

 and LA 435

Louisiana Highway 435

Louisiana Highway 435 is a state highway in Louisiana that serves St. Tammany. It spans in a west to east direction. It is known locally throughout its run as Level Street, Talisheek Highway, and Boyd Davis Road.-Route description:...

 at Maple Street. The highway then turns northward along Maple Street and overlaps LA 36

Louisiana Highway 36

Louisiana Highway 36 is a state highway in Louisiana that serves St. Tammany Parish. It spans and is bannered east/west.-Route description:...

 for roughly a quarter of a mile. The highways split again and LA 59 turns northward again, becoming Range Line Road. It continues northward until a terminus with LA 21

Louisiana Highway 21

Louisiana Highway 21 is a state highway in Louisiana that serves St. Tammany and Washington Parishes. It spans and is bannered north/south.-Route description:...

.

In 2008 the stop signs for the intersections in Abita Springs were eliminated as all the intersections were amalgamated into a roundabout

Roundabout

A roundabout is the name for a road junction in which traffic moves in one direction around a central island. The word dates from the early 20th century. Roundabouts are common in many countries around the world...

, ensuring a smoother flow of traffic as left turns ceased to exist.

Junction list

Parish	Location	Mile	Junction	Notes
St. Tammany St. Tammany Parish, Louisiana St. Tammany Parish is a parish located in the U.S. state of Louisiana, in the New Orleans–Metairie–Kenner Metropolitan Statistical Area. The parish seat is Covington....	Mandeville Mandeville, Louisiana Mandeville is a city in St. Tammany Parish, Louisiana, United States. The population was 12,421 in 2008. Mandeville is located on the North Shore of Lake Pontchartrain, south of Interstate 12. It is across the lake from the city of New Orleans and its southshore suburbs...	Southern terminus of LA 59
		0.00	US 190 U.S. Route 190 U.S. Route 190, also known as the Ronald Reagan Memorial Highway, is an east–west United States highway in Louisiana and Texas. It evolved from the shortest of intrastate routes in 1926 to a length comparable to a main Interstate Highway route, leading from the swamps and pine forests of...  (Florida Street) LA 1087 Louisiana Highway 1087 Louisiana Highway 1087 is a state highway in Louisiana that serves St. Tammany Parish. It spans in a southwest to northeast direction. It is known locally as Monroe Street and Girod Street.-Route description:...  (Girod Street)	Eastern terminus of LA 1087
			LA 1088 Louisiana Highway 1088 Louisiana Highway 1088 is a state highway in Louisiana that serves St. Tammany Parish. It spans and runs from southwest to northeast.-Route description:...	Southwestern terminus of LA 1088
			I-12	Exit 65/Diamond Interchange
	Abita Springs Abita Springs, Louisiana Abita Springs is a town in St. Tammany Parish, Louisiana, United States. The estimated population, in 2003, was 2,112. It is part of the New Orleans–Metairie–Kenner Metropolitan Statistical Area.-History:...		LA 36 Louisiana Highway 36 Louisiana Highway 36 is a state highway in Louisiana that serves St. Tammany Parish. It spans and is bannered east/west.-Route description:...  (Maple Street) LA 435 Louisiana Highway 435 Louisiana Highway 435 is a state highway in Louisiana that serves St. Tammany. It spans in a west to east direction. It is known locally throughout its run as Level Street, Talisheek Highway, and Boyd Davis Road.-Route description:...  (Level Street)	LA 59 turns north on to Maple Street Western terminus of LA 435 LA 36 departs to the east
		Begin concurrency
			LA 36 Louisiana Highway 36 Louisiana Highway 36 is a state highway in Louisiana that serves St. Tammany Parish. It spans and is bannered east/west.-Route description:...  (Abita Road)	LA 36 departs to the west
		End concurrency
		11.75	LA 21 Louisiana Highway 21 Louisiana Highway 21 is a state highway in Louisiana that serves St. Tammany and Washington Parishes. It spans and is bannered north/south.-Route description:... (Military Road)
		Northern terminus of LA 59