Louisiana Highway 21
Encyclopedia
Louisiana Highway 21 is a state highway
in Louisiana
that serves St. Tammany and Washington Parishes. It spans 51.76 miles (83.3 km) and is bannered north/south.
and Louisiana Highway 1077
in Madisonville, where LA 21 assumes the trajectory of LA 1077 and heads northeast. LA 1077 branches to the northwest before LA 21 intersects Interstate 12
. From south of I-12 and until joining US 190 Business
on 21st Avenue in Covington
, LA 21 is multilane, in places divided by a median or by a center turn lane, with some control of access. Through most of Covington LA 21 is in a mostly two-lane undivided concurrency with US 190 Business
, which returns to U.S. Route 190
on the east side of Covington—an area known as Claiborne Hill. After intersecting US 190 and before leaving Covington cosigned as Military Road, LA 21 absorbs LA 36 and continues northeastward, absorbing LA 59 and entering a brief concurrency
with Louisiana Highway 40 in Bush for less than one mile (1.6 km). Between Bush and Sun, LA 21 widens to a four lane, divided highway after merging Louisiana Highway 41, continuing due north from the merge. In Sun LA 21 absorbs LA 16 and continues northward to Bogalusa
, where LA 21 intersects LA 10. LA 21 then runs north through Varnado and Angie before becoming Mississippi Highway 35 at the state line.
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 and Washington Parishes. It spans 51.76 miles (83.3 km) and is bannered north/south.
Route description
From the south, LA 21 begins at an intersection with Louisiana Highway 22Louisiana Highway 22
Louisiana Highway 22 is a state highway in Louisiana that serves St. Tammany, Tangipahoa, Livingston, and Ascension Parishes. It spans in a rough east/west direction and is bannered in each cardinal direction ....
and Louisiana Highway 1077
Louisiana Highway 1077
Louisiana Highway 1077 is a state highway in the U.S. state of Louisiana in St. Tammany Parish. It spans and is bannered north/south. It is known locally as Main Street, St. John Street, Covington Highway, and Savannah Road throughout its run....
in Madisonville, where LA 21 assumes the trajectory of LA 1077 and heads northeast. LA 1077 branches to the northwest before LA 21 intersects 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...
. From south of I-12 and until joining US 190 Business
Business route
A business route in the United States and Canada is a short special route connected to a parent numbered highway at its beginning, then routed through the central business district of a nearby city or town, and finally reconnecting with the same parent numbered highway again at its...
on 21st Avenue in Covington
Covington, Louisiana
Covington is a city in and the parish seat of St. Tammany Parish, Louisiana, United States. The population was 8,483 at the 2000 census. It is located at a fork of the Bogue Falaya and the Tchefuncte River....
, LA 21 is multilane, in places divided by a median or by a center turn lane, with some control of access. Through most of Covington LA 21 is in a mostly two-lane undivided concurrency with US 190 Business
Business route
A business route in the United States and Canada is a short special route connected to a parent numbered highway at its beginning, then routed through the central business district of a nearby city or town, and finally reconnecting with the same parent numbered highway again at its...
, which returns to U.S. Route 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...
on the east side of Covington—an area known as Claiborne Hill. After intersecting US 190 and before leaving Covington cosigned as Military Road, LA 21 absorbs LA 36 and continues northeastward, absorbing LA 59 and entering a brief concurrency
Concurrency (road)
A concurrency, overlap, or coincidence in a road network is an instance of one physical road bearing two or more different highway, motorway, or other route numbers...
with Louisiana Highway 40 in Bush for less than one mile (1.6 km). Between Bush and Sun, LA 21 widens to a four lane, divided highway after merging Louisiana Highway 41, continuing due north from the merge. In Sun LA 21 absorbs LA 16 and continues northward to Bogalusa
Bogalusa, Louisiana
Bogalusa is a city in Washington Parish, Louisiana, United States. The population was 13,365 at the 2000 census. It is the principal city of the Bogalusa Micropolitan Statistical Area, which includes all of Washington Parish and is also part of the larger New Orleans–Metairie–Bogalusa...
, where LA 21 intersects LA 10. LA 21 then runs north through Varnado and Angie before becoming Mississippi Highway 35 at the state line.