From the west, LA400 begins at the east end of a bridge across the Cancienne Canal. It continues the path of a local road that begins at a junction with LA401 just north of Attakapas Landing on Lake Verret. LA400 heads eastward and intersects LA1011 and LA1010 before ending at a junction with LA1 opposite Bayou Lafourche. LA400 is an undivided two-lane highway for its entire length.[2][3][4]
Louisiana Highway 401 (LA401) runs 9.41 miles (15.14km) in a southwest to northeast direction from a dead end at Lake Verret in Attakapas Landing to a junction with LA1 in Napoleonville, Assumption Parish.[5] The route's mileposts increase from the eastern end contrary to common practice.
Louisiana Highway 402 (LA402) runs 5.07 miles (8.16km) in an east–west direction from a local road west of Brusle St. Vincent to LA308 north of Napoleonville, Assumption Parish.[6] The route's mileposts increase from the eastern end contrary to common practice.
Louisiana Highway 404 (LA404) runs 8.23 miles (13.24km) in an east–west direction from LA75 at Choctaw to LA69 at Samstown, Iberville Parish.[8] The route's mileposts increase from the eastern end contrary to common practice.
LA406 heads north from LA23 (Belle Chasse Highway) in Belle Chasse. Traveling along Woodland Highway, the route passes a series of newer residential subdivisions. The roadway curves to the northeast, traversing a corner of Orleans Parish, and passes a small cluster of industrial facilities located alongside the Gulf Intracoastal Waterway. LA406 proceeds straight ahead and crosses from Plaquemines Parish again into Orleans Parish, simultaneously re-entering the New Orleans city limits. After crossing underneath the Woodland Bridge, LA406 engages in a roundabout with LA407, which loops around onto the bridge and across the waterway. The highway then passes the entrance to the upscale English Turn residential community and country club. LA406 curves due east onto Patterson Drive (also known as River Road) along the Mississippi River levee and proceeds to an intersection with Stanton Road. River Road continues as a local road until reaching the U.S. Coast Guard station three miles (4.8km) later.[10][11][12][13]
LA407 begins at a roundabout junction with LA406 (Woodland Highway) near the English Turn residential subdivision in the Lower Coast Algiers area of New Orleans. The divided four-lane highway loops to the north and proceeds across the high-level Woodland Bridge over the Gulf Intracoastal Waterway, located along the Orleans–Plaquemines parish line. Returning to grade, LA407 intersects General de Gaulle Drive, which continues ahead through Algiers toward the Crescent City Connection bridge spanning the Mississippi River in Downtown New Orleans. LA407 turns north from this junction onto Woodland Drive and narrows to an undivided four-lane highway. The route continues in this capacity through the residential Old Aurora neighborhood until reaching an intersection with LA428 (General Meyer Avenue).[12][13][14]
Louisiana Highway 408 (LA408) runs 12.28 miles (19.76km) in an east–west direction from a local road in Baton Rouge to a junction with the concurrent LA37/LA64 in Central, East Baton Rouge Parish. The route connects northern Baton Rouge with Greenwell Springs, a rural community within the Central city limits.[4][15][16]
LA408 begins on Harding Boulevard at the west end of the Canadian National Railway/Kansas City Southern Railway overpass alongside the Southern University campus. This terminus is located in an area within the Baton Rouge city limits known as Scotlandville. LA408 heads east across the overpass as a divided four-lane highway and intersects US61 (Scenic Highway). Several blocks later, the highway passes through an interchange with I-110 at exit 6, connecting to Downtown Baton Rouge and Natchez, Mississippi. Jutting out from this junction is Veterans Memorial Boulevard, a local road that provides access to Baton Rouge Metropolitan Airport. After passing along the south side of the airport, LA408 crosses LA67 (Plank Road), and the local name changes from Harding Boulevard to Hooper Road. 3.2 miles (5.1km) after exiting the Baton Rouge city limits, LA408 crosses the Comite River into the suburban city of Central. Over the next 3.3 miles (5.3km) are junctions with LA410 (Blackwater Road), LA946 (Joor Road), and LA3034 (Sullivan Road). During this stretch, LA408 narrows to an undivided two-lane highway. It continues northeast in this capacity until reaching a junction with LA37/LA64 (Greenwell Springs Road), which parallels the Amite River.[4][15][16]
LA409 heads north on Liberty Road from a T-intersection with LA64 in area within the Central city limits known as Indian Mound. The highway travels about 6.7 miles (10.8km) to the community of Pride, where it curves east onto Pride-Baywood Road then turns north onto Riley Road. North of Pride, LA409 crosses from East Baton Rouge Parish into East Feliciana Parish and proceeds to a junction with LA959 at Blairstown. LA409 is an undivided two-lane highway for its entire length.[4][16][17][18] As of 2018, the portion in East Baton Rouge Parish (except for the portion south of Bethel Church) is under agreement to be removed from the state highway system and transferred to local control.[19]
LA411 heads northwest from LA76 in Rosedale alongside the east bank of Bayou Grosse Tete. After about six miles (9.7km), the route passes along the eastern edge of Maringouin, which is accessed by bridge via LA977. Shortly afterward, the highway crosses from Iberville Parish into Pointe Coupee Parish. LA411 continues along the bayou until reaching a junction with US190 (Airline Highway) in Livonia, connecting with the cities of Baton Rouge and Opelousas. LA78 continues the path of the roadway northward toward New Roads. LA411 is an undivided two-lane highway for its entire length.[4][21][22][23]
Prior to the 1955 highway number redesignations, the current LA Highway 413 ran along road beds that were parts of LA State Route 73, LA State Route 139, and LA State Route 135 of the old numbering system. The portion of the highway from Rosedale Road that runs north to near False River was the old LA State Route 73 portion. The portion that runs along False River and carries the local name "Island Road" was the old LA State Route 139 portion. The portion of the current highway that runs east-west from near Patin Dyke to New Roads was the old LA State Route 135 portion.[27]
LA413 heads north on Poydras Bayou Drive from LA76 (Rosedale Road) in West Baton Rouge Parish. It crosses the concurrent US190/LA1 (Airline Highway) in Erwinville. The highway then skirts the Pointe Coupee Parish line for a short time before crossing it at a junction with LA3091 (Flynn Road). LA413 makes a brief zigzag onto LA416 in Lakeland. Shortly afterward, the route turns west at an intersection with LA414 (Island Road) and makes a long loop alongside False River through Jarreau and Dupont to Ventress. Here, LA413 meets LA414 (Ventress Road) a second time and turns north briefly to a junction with LA415 (Patin Dyke Road) at Patin. The highway turns west once again and enters the city of New Roads, where it terminates at a junction with LA1 Bus. at the corner of Main and New Roads Streets. LA413 is an undivided two-lane highway for its entire length.[4][23][25][26]
Louisiana Highway 414 (LA414) runs 10.55 miles (16.98km) in a general north–south direction from LA413 north of Lakeland to a second junction with LA413 at Ventress, Pointe Coupee Parish. The route travels in a loop off of LA413 around an area between the False River and Mississippi River known as "The Island".[4][23][28]
LA414 heads northeast from LA413 through Chenal and across the Kansas City Southern Railway line to a junction with LA415 (River Road) at the Mississippi River levee. The route turns north alongside the levee and travels concurrent with LA415 for 2.2 miles (3.5km). LA414 then turns west and proceeds back across the KCS rail line to its terminus at LA414 in Ventress. It is an undivided two-lane highway for its entire length.[4][23][28]
Louisiana Highway 416 (LA416) runs 7.25 miles (11.67km) in an east–west direction from LA1 at Knapp to LA415 at Hermitage, Pointe Coupee Parish.[4][23][31] The route's mileposts increase from the eastern end contrary to common practice.
LA416 heads east from LA1 through Lakeland, where it intersects LA413. The road curves northeast through Rougon and briefly overlaps LA983. At Glynn, LA416 crosses the Kansas City Southern Railway (KCS) tracks at grade and intersects LA982. The route continues northeast to a junction with LA415 in Hermitage at the west bank levee of the Mississippi River. LA416 is an undivided two-lane highway for its entire length.[4][23][31]
Louisiana Highway 417 (LA417) runs 24.28 miles (39.07km) in a north–south direction from LA10 at Red Cross to LA418 at Legonier, Pointe Coupee Parish. It exists in two sections, as part of the route between Red Cross and Coon is under local control.[32][33]
The route heads northeast from LA417 and crosses LA1 in Innis. It then turns northward alongside the west bank levee of the Mississippi River past Williamsport and the Angola Ferry landing. At Torras, LA418 curves westward and crosses LA15 near the Old River Lock. The highway continues along the Lower Old River and Atchafalaya River to a second junction with LA1 in Legonier at the foot of a bridge connecting to Simmesport. LA418 is an undivided two-lane highway for its entire length.[4][23][34]
Louisiana Highway 419 (LA419) runs 7.36 miles (11.84km) in an east–west direction from LA417 at Quinton to the junction of two private roads east of Lacour, Pointe Coupee Parish.[35]
LA420 initially heads north from LA1/LA10 past Pointe Coupee Central High School then reaches the west bank of the Mississippi River and turns eastward. Following the river levee to Pointe Coupee, the highway intersects LA981. It then turns south a short distance to intersect LA10. The road continues straight ahead into New Roads as LA10 Bus. LA420 is an undivided two-lane highway for its entire length.[4][23][36]
The route heads east on Oak Street from LA19 (Main Street) in Norwood. After one block, LA422 turns south onto Azalea Street and runs parallel to LA19 for a short distance before resuming an eastward course for the remainder of its route. The highway travels through the northern central portion of the parish, just south of the Mississippi state line. The eastern terminus at Felps is located about 10 miles (16km) north of Clinton. LA422 is an undivided two-lane highway for its entire length.[4][18]
Louisiana Highway 423 (LA423) runs 2.43 miles (3.91km) in an east–west direction along Thomas Road from LA19 to LA67 between Baton Rouge and Baker in East Baton Rouge Parish.[38] As of 2018, it is under agreement to be removed from the state highway system and transferred to local control.[39]
Louisiana Highway 424 (LA424) runs 11.86 miles (19.09km) in a general east–west direction from LA62 north of Pine to a second junction with LA62 north of State Line, Washington Parish.[40]
Louisiana Highway 426 (LA426) runs 7.39 miles (11.89km) in an east–west direction from LA73 in Baton Rouge to US190 between Baton Rouge and Denham Springs. The route is located entirely within East Baton Rouge Parish and is known locally as Old Hammond Highway.[4][16][42]
LA426 heads east from LA73 (Jefferson Highway) in Baton Rouge as an undivided four-lane highway. It intersects LA1068 (Drusilla Lane) just before crossing US61 (Airline Highway), where the roadway widens to include a center turning lane. Shortly before exiting the city limits, LA426 narrows to two lanes at an intersection with Boulevard de Province. The route proceeds eastward and intersects LA3245 (O'Neal Lane) before terminating at US190 (Florida Boulevard) just west of the Amite River.[4][16][42]
LA426 was the original traffic route between Baton Rouge and Denham Springs in the early 20th century. Known as Benton's Ferry Road, it traveled from Jefferson Highway (formerly called Clay Cut Road) to Benton's Ferry on the Amite River near the present location of the US190 crossing. The ferry service was replaced in 1918 by a bridge (which was in turn replaced by an improved bridge crossing in 1933). The highway was designated as part of State Route 7 in 1921, and it became part of the original alignment of US190 in 1926. Both designations were removed from the route in 1942 when an extension of Florida Boulevard from Downtown Baton Rouge to the Amite River was completed. The road remained in the state highway system as State Route 7-D until becoming LA426 in the 1955 Louisiana Highway renumbering.
As of 2018, LA426 is under agreement to be removed from the state highway system and transferred to local control.[43]
Louisiana Highway 427 (LA427) runs 14.57 miles (23.45km) in a northwest to southeast direction from LA73 in Baton Rouge, East Baton Rouge Parish to a second junction with LA73 at Hope Villa, Ascension Parish. It is a busy suburban commercial and residential thoroughfare over most of its route and almost entirely parallels I-10.[4][16][44][45]
LA427 heads south from LA73 (Government Street) along South Acadian Thruway as an undivided four-lane highway. After passing through a diamond interchange with I-10 at exit 157B, the route turns southeast onto Perkins Road, gaining a center turning lane, and proceeds out of the Baton Rouge city limits. Intersections with several major thoroughfares connect with the interstate to the northeast, including LA3064 (Essen Lane), LA1248 (Bluebonnet Boulevard), and LA3246 (Siegen Lane). The roadway narrows to two lanes after passing the latter junction and generally remains in that capacity for the remainder of the route. Just before it crosses into Ascension Parish, LA427 briefly makes a jog onto LA42 (Highland Road) through a second interchange with I-10 at Kleinpeter. The route then curves to the northeast at LA928 (Bluff Road) and crosses US61 (Airline Highway). Shortly afterward, LA427 terminates at LA73 (Old Jefferson Highway) south of Hope Villa, within the census-designated boundary of Prairieville.[4][16][44][45] As of 2018, the portion of LA427 in East Baton Rouge Parish is under agreement to be removed from the state highway system and transferred to local control.[46]
Louisiana Highway 428 (LA428) runs 8.82 miles (14.19km) from LA23 near Belle Chasse to LA407 in New Orleans. The route travels in an irregular direction and exists in two segments connected by local roads. The portion that travels on General de Gaulle Drive, however, is bannered east–west.[13][47][48]
LA428 begins at a point on LA23 (Belle Chasse Highway) between Belle Chasse and Gretna near the Jefferson–Plaquemines parish line. It heads north on Behrman Highway, an undivided four-lane thoroughfare with a center turning lane. The highway crosses from Jefferson Parish into an area of New Orleans (co-extensive with Orleans Parish) known as Algiers. Just before the local name changes to Behrman Place, the center lane is replaced by a median, and the route proceeds to an intersection with General de Gaulle Drive. LA428 turns west onto General de Gaulle Drive, a divided six-lane thoroughfare with a wide right-of-way that includes a drainage canal. The highway engages into a partial cloverleaf interchange with US90 Bus. (Westbank Expressway). Approaching this junction, the westbound carriageway widens to five lanes to accommodate traffic exiting onto the Crescent City Connection into Downtown New Orleans.[12][13][47][49]
Passing through the interchange, the roadway narrows to a divided four-lane highway, and LA428 soon crosses back into Jefferson Parish and enters the city of Gretna, where the local name changes to Burmaster Street. LA428 then turns north onto Franklin Avenue at the northern terminus of LA23 and remains a divided four-lane highway. The highway re-enters the city of New Orleans for a final time, and the local name changes to Nunez Street. LA428 crosses underneath the Crescent City Connection on US90 Bus. and engages into a roundabout with Mardi Gras Boulevard, a local road, at grade level between the two bridge spans. Shortly afterward, LA428 turns to the northeast, and state maintenance ends at the five-point intersection of Lamarque, Vallette, Verret, and Hermosa Streets. Local traffic may travel north on Vallette Street and east onto Newton Street, where state maintenance resumes at an intersection with Behrman Avenue. Here, the roadway widens from two lanes to four lanes with a median and becomes known as General Meyer Avenue. LA428 proceeds eastward to a terminus at LA407 (Woodland Drive).[13][47][48][49]
As of 2019, a small portion in Jefferson Parish intersecting LA23 is under agreement to be removed from the state highway system and transferred to local control.[50]
From the south, LA 434 begins at the intersection of Lake Road and Barringer Road about 2 miles (3.2km) from the shore of Lake Pontchartrain. It proceeds northward on Lake Road to a junction with US 190 and LA 1093-1. At this point, it turns northeast concurrent with US 190 across Bayou Lacombe. Shortly thereafter, LA 434 turns northward and eventually intersects I-12 at a diamond interchange at Exit 74. It continues northward through the community of St. Tammany to a terminus at LA 36.
LA 434 is an undivided two-lane highway for its entire length.
Louisiana Highway 435 (LA435) runs 11.47 miles (18.46km) in an east–west direction from LA36/LA59 in Abita Springs to LA41 in Talisheek. It is an undivided two-lane highway for its entire length.
The route has a spur that travels 0.70 miles (1.13km) to an alternate connection with LA41, essentially forming a large Y-junction between LA435 and LA41.
The route heads east from LA 441 from a point just north of the Hutchinson Creek Wildlife Management Area and soon crosses from St. Helena Parish into Tangipahoa Parish.[64][65][66] It then passes through an interchange with I-55 south of Kentwood and intersects the parallel US 51 in Tangipahoa. Just east of Tangipahoa, the roadway continues straight ahead as LA 1057 while LA 440 dips to the south onto a parallel alignment through Bolivar. Just before crossing into Washington Parish, LA 440 curves to the northeast and rejoins LA 1057.[64][66][67] In Washington Parish, LA 440 heads slightly southeast to its terminus at LA 10 in Richardson, a point west of Franklinton.[64][66][68]
Louisiana Highway 441 (LA441) runs 43.74 miles (70.39km) in a north–south direction from LA42 west of Springfield to the Mississippi state line north of Easleyville.[69]
Louisiana Highway 442 (LA442) runs 23.22 miles (37.37km) in an east–west direction from LA63 north of Livingston to the junction of LA40 and LA443 north of Hammond.[70]
The route heads east from LA63 and intersects LA1036 and LA441, both of which it overlaps as it crosses various branches of the Tickfaw River. Further east, LA442 intersects LA43 and crosses from Livingston Parish into Tangipahoa Parish. Just west of Tickfaw, LA442 passes through a diamond interchange with I-55 at exit 36. In the center of town, LA442 zigzags via US51 and proceeds northeast out of the corporate limits. After crossing the Tangipahoa River, the route curves due east to its terminus at a four-way junction with LA40 and LA443 south of Loranger. LA442 is an undivided two-lane highway for its entire length.[70]
The route heads northeast out of Hammond and has a brief concurrency with LA 1064 north of town. After crossing the Tangipahoa River, LA 443 turns due north to its end at LA 40 and LA 442, connecting to Tickfaw, Independence, and Folsom. LA 443 is an undivided two-lane highway for its entire length.[66][71][72]
The route heads northeast out of French Settlement, intersecting LA 63 at Verdun, and parallels the route of LA 22 into Killian. LA 444 is an undivided two-lane highway for its entire length.[66][73][74]
The route heads north from LA 16 in Port Vincent as an undivided two-lane highway. Upon entering Walker, LA 447 passes through a diamond interchange with I-12 at Exit 15. The highway widens to four lanes with a center turning lane and proceeds through downtown Walker, crossing both US 190 and LA 1027. Reverting again to two lanes, LA 447 proceeds north through rural west-central Livingston Parish and intersects LA 1029, LA 1025, LA 1024, and LA 1019 before ending at LA 63 near the St. Helena Parish line.
A rural route heading along the west side of St. Helena Parish, LA 444 parallels the Amite River at a distance, connecting LA 10 and LA 37, which intersect in Greensburg to the east. It is an undivided two-lane highway for its entire length.[65][66][76]
LA 449 heads north from Walker and intersects LA 1024, followed by LA 63. LA 449 turns west concurrent with LA 63 for a very short time before the former turns again to the north. After crossing from Livingston Parish into St. Helena Parish, LA 449 enters the community of Pine Grove, where it intersects LA 16. LA 449 makes a brief jog east onto LA 16 before proceeding north again at LA 1041. LA 449 continues in a north-northeast direction to a terminus at LA 37 southeast of Greensburg.
LA 449 is an undivided two lane highway for its entire length.
Louisiana Highway 81 (LA 81) is a state highway located in Pointe Coupee Parish, Louisiana. It runs 8.82 miles (14.19 km) in a generally north–south direction from LA 77 in Livonia to a second junction with LA 77 in Fordoche.
Louisiana Highway 78 (LA 78) is a state highway located in Pointe Coupee Parish, Louisiana. It runs 7.55 miles (12.15 km) in a north–south direction from a junction with U.S. Highway 190 (US 190) and LA 411 in Livonia to LA 1 in Parlange.
Louisiana Highway 824 (LA 824) is a collection of three state-maintained streets located in the Lincoln Parish town of Dubach that have a total length of 0.38 miles (0.61 km). All three routes were established in the 1955 Louisiana Highway renumbering and are presently unsigned. As of 2017, the routes are currently under agreement to be transferred to local control.
1 2 Louisiana Department of Transportation and Development Office of Multimodal Planning (February 2012). Assumption Parish(PDF) (Map). Louisiana Department of Transportation and Development. Retrieved May 9, 2016.
1 2 Louisiana Department of Transportation and Development Office of Multimodal Planning (February 2012). Plaquemines Parish (Northwest Section)(PDF) (Map). Louisiana Department of Transportation and Development. Retrieved May 9, 2016.
1 2 3 4 5 Louisiana Department of Transportation and Development Office of Multimodal Planning (February 2012). Orleans Parish(PDF) (Map). Louisiana Department of Transportation and Development. Retrieved May 9, 2016.
1 2 3 4 5 6 7 8 Louisiana Department of Transportation Office of Multimodal Planning (February 2012). East Baton Rouge Parish(PDF) (Map). Louisiana Department of Transportation and Development. Retrieved May 9, 2016.
1 2 3 4 Louisiana Department of Transportation Office of Multimodal Planning (February 2012). East Feliciana Parish(PDF) (Map). Louisiana Department of Transportation and Development. Retrieved May 9, 2016.
1 2 Louisiana Department of Transportation and Development Office of Multimodal Planning (February 2012). Iberville Parish (West Section)(PDF) (Map). Louisiana Department of Transportation and Development. Retrieved May 9, 2016.
1 2 3 4 5 6 7 8 9 10 11 12 Louisiana Department of Transportation and Development Office of Multimodal Planning (February 2012). Pointe Coupee Parish(PDF) (Map). Louisiana Department of Transportation and Development. Retrieved May 9, 2016.
1 2 Louisiana Department of Transportation and Development Office of Multimodal Planning (February 2012). West Baton Rouge Parish(PDF) (Map). Louisiana Department of Transportation and Development. Retrieved May 9, 2016.
↑ Louisiana Department of Highways Traffic and Planning Section (1952). East Baton Rouge Parish (Map) (January 1, 1958ed.). Louisiana Department of Highways.
1 2 Louisiana Department of Transportation and Development Office of Multimodal Planning (February 2012). Ascension Parish(PDF) (Map). Louisiana Department of Transportation and Development. Retrieved May 9, 2016.
1 2 Louisiana Department of Transportation and Development Office of Multimodal Planning (February 2012). Jefferson Parish (North Section)(PDF) (Map). Louisiana Department of Transportation and Development. Retrieved May 9, 2016.
1 2 St. Helena Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved September 28, 2013.
↑ Tangipahoa Parish (North Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 16, 2013.
↑ Washington Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 16, 2013.
↑ Tangipahoa Parish (South Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Archived from the original(PDF) on August 26, 2012. Retrieved September 28, 2013.
↑ Livingston Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved September 28, 2013.[permanent dead link]
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LA 1011 
LA 1010 
LA 1 – Napoleonville, Thibodaux 
