Louisiana Highway 21

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Louisiana Highway 21 marker

Louisiana Highway 21
Route information
Maintained by Louisiana DOTD
Length52.1 mi[1] (83.8 km)
Existed1955 renumbering–present
Major junctions
South end LA 22 / LA 1077 in Madisonville
 
North end MS 35 at Mississippi state line
Highway system
  • Louisiana Highway System
LA 20LA 22

Louisiana Highway 21 (LA 21) is a state highway in Louisiana that serves St. Tammany and Washington Parishes. It spans 51.76 miles (83.30 km) and is signed north and south.

Route description[edit]

From the south, LA 21 begins at an intersection with LA 22 and LA 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 (I-12). From south of I-12 and until joining U.S. Route 190 Business (US 190 Bus.) on 21st Avenue in Covington, LA 21 is multilaned, in places divided by a median or by a center turn lane, with some control of access.[1]

Improved, multilane, divided section of LA 21 between Covington and Madisonville

Through most of Covington, LA 21 is in a mostly two-lane undivided highway concurrent with US 190 Bus., which returns to US 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.[1]

Major intersections[edit]

ParishLocationmi[1]kmDestinationsNotes
St. TammanyMadisonville0.00.0 LA 22 (Mulberry Street) / LA 1077 south (Main Street) – Fairview Riverside State Park, Maritime MuseumSouth end of LA 1077 overlap
1.21.9 LA 1077 north to I-12North end of LA 1077 overlap
3.4–
3.6
5.5–
5.8
I-12 – Hammond, SlidellI-12 exit 59
Covington6.610.6
US 190 Bus. west (West 21st Avenue) / North Tyler Street
South end of US 190 Bus. overlap
7.812.6 US 190 east to I-12 – Mandeville, New OrleansInterchange; westbound US 190 entrance only
7.9–
8.0
12.7–
12.9

US 190 Bus. east to US 190 – Franklinton
North end of US 190 Bus. overlap
8.0–
8.1
12.9–
13.0
LA 36 east (Covington Highway) – Abita SpringsWestern terminus of LA 36
11.919.2 LA 1082 north (Old Military Road)Southern terminus of LA 1082
12.319.8 LA 59 south (Range Line Road) – Abita SpringsNorthern terminus of LA 59
13.121.1 LA 1084 eastWestern terminus of LA 1084
Waldheim15.224.5 LA 1083 southSouth end of LA 1083 overlap
15.424.8 LA 1083 north (Ben Williams Road)North end of LA 1083 overlap
21.935.2 LA 40 west / Daisy RoadSouth end of LA 40 overlap
22.436.0 LA 40 east / Columbia RoadNorth end of LA 40 overlap
23.337.5 LA 41 south – SlidellNorthern terminus of LA 41
Sun25.541.0 LA 16 westEastern terminus of LA 16
Washington27.444.1 LA 1075 northSouthern terminus of LA 1075
Bogalusa36.358.4 LA 10 (Louisiana Avenue)
38.862.4 LA 436 eastTerminus of LA 1082
42.969.0 LA 436 – Pine, Franklinton
Varnado44.070.8 LA 436-1 east (Main Street) / Seal Cemetery Road – Varnado High SchoolWestern terminus of LA 436-1
Angie48.978.7 LA 1071 eastWestern terminus of LA 1071
49.479.5 LA 438 west (Elm Street)Eastern terminus of LA 438
52.183.8 MS 35 north – ColumbiaMississippi state line
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References[edit]

  1. ^ a b c d Google (April 15, 2019). "Louisiana Highway 21" (Map). Google Maps. Google. Retrieved April 15, 2019.

External links[edit]

KML is from Wikidata