Louisiana Highway 550 (LA 550) runs 18.89 miles (30.40km) in a north–south direction from LA 2 east of Bernice to the Arkansas state line north of Laran, Union Parish.[2]
The route heads northeast from LA 2 and intersects LA 15 southeast of Spearsville. LA 550 then curves northward and passes through Laran before crossing the Arkansas state line. The road continues toward Hillsboro, Arkansas and US 82 as Union County Road 32. It is an undivided two-lane highway for its entire length.[2][3][4]
The route heads northwest out of Marion, traversing a rural area and skirting the northeast side of the Union Wildlife Management Area. Its northern terminus at LA 549 is located 1.08 miles (1.74km) south of the Arkansas state line. LA 551 is an undivided two-lane highway for its entire length.[4][5][6]
Louisiana Highway 554 (LA 554) runs 8.02 miles (12.91km) in an east–west direction from a junction with US 165 and LA 2 at Perryville to LA 138 southwest of Collinston.[9]
The western terminus at US 165 and LA 2 is located on the Ouachita–Morehouse parish line. From this point, the route heads eastward through Ouachita Parish for 2.6 miles (4.2km) before crossing Little Bayou Boeuf into Morehouse Parish. LA 554 intersects LA 139, which connects to Monroe and Bastrop. It continues eastward then makes a sharp curve to the south near its eastern terminus at LA 138. LA 554 is an undivided two-lane highway for its entire length.[4][9][10][11]
The route heads north from LA 15 at a point about 2.0 miles (3.2km) east of Spearsville. Just before crossing the state line, LA 558 intersects LA 3121 in Lockhart. It continues toward El Dorado, Arkansas and US 167 as Arkansas Highway 7. LA 558 is an undivided two-lane highway for its entire length.[3][4][15]
The route heads northward from US 84 and follows Brushy Bayou for about 3.0 miles (4.8km). It then curves slightly northeast to a point on the Tensas River known as Dunbarton. LA 566 turns east and roughly follows the river into the town of Clayton. Here, it intersects the concurrent US 425 and LA 15 at the foot of a twin bridge across the Tensas River. LA 566 curves to the north with the river and crosses from Concordia Parish into Tensas Parish.[22][23][24]
Soon after crossing the parish line, LA 566 intersects LA 571, the route of which follows a semi-circle west of Waterproof. LA 566 turns to the southeast at a second intersection with LA 571 and passes through Troy to a point on US 65 and LA 568 just southwest of Waterproof. LA 566 officially proceeds with LA 568 a short distance further to an intersection with LA 570, but this portion of the route is signed in the field only as LA 568.[22][24][25]
Louisiana Highway 571 (LA 571) runs 12.13 miles (19.52km) in a southwest to northeast semi-circle from LA 566 north of Clayton to a second junction with LA 566 west of Waterproof, Tensas Parish.[30]
Louisiana Highway 584 (LA 584) runs 8.01 miles (12.89km) in an east–west direction from LA 135 to a point just east of LA 3048 in an area south of Rayville, Richland Parish.[43]
Louisiana Highway 593 (LA 593) runs 17.23 miles (27.73km) in a north–south direction from LA 138 in Collinston to US 425 north of Bastrop.[55]
The route heads northwest from Collinston and shortly intersects LA 3079. It travels through sparsely populated areas until passing just west of the Morehouse Memorial Airport, entering the city of Bastrop. LA 593 intersects LA 139, and the two highways run concurrently into the center of town, becoming a one-way couplet at the Morehouse General Hospital. A few blocks later, LA 593 intersects the one-way couplet of US 165/US 425/LA 2, ending its concurrency with LA 139 and beginning one with US 425. The one-way couplet ends two blocks to the north, and LA 593 splits from US 425 soon afterward. North of town, LA 593 passes by the Morehouse Country Club, the Georgia Pacific Wildlife Management Area, and Bussy Brake, all to the west of the road. LA 593 loops back to the east and ends at a final junction with US 425.
LA 594 initially heads northeast on Texas Avenue from LA 15, near the latter's intersection with US 165 Business. The highway crosses over I-20 and immediately intersects 18th Street, connecting to a tight diamond interchange with the interstate. LA 594 turns to the east parallel with I-20 and intersects mainline US 165 near the Pecanland Mall. After a few miles, LA 594 reaches Millhaven and turns due north. It intersects US 80 as it passes Ouachita Parish High School and continues north through Swartz to its terminus at LA 139.
LA 594 is an undivided two-lane highway for its entire length.
Louisiana Highway 595 (LA 595) runs 3.41 miles (5.49km) in a north–south direction from a junction with US 80 and LA 133 in Start to the Richland–Morehouse parish line.[57]
The route heads north from the concurrent US 80 and LA 133 in Start, a small community in northwestern Richland Parish. After curving westward, LA 595 turns north at a T-intersection with a local road. State maintenance ends at a bridge over Bayou Lafourche, which forms the boundary between Richland Parish and Morehouse Parish. LA 595 is an undivided two-lane highway for its entire length.[4][57][58]
Interstate 12 (I-12) is an intrastate Interstate Highway located entirely within the US state of Louisiana. It spans a total of 85.59 miles (137.74 km) in an east–west direction from I-10 in Baton Rouge to an interchange with both I-10 and I-59 in Slidell. Along the way, it passes through the city of Hammond, where it intersects I-55 and US Route 51 (US 51). It also serves the cities of Ponchatoula and Denham Springs, as well as the St. Tammany Parish cities of Covington and Mandeville. Skirting the northern shore of Lake Pontchartrain, I-12 serves as both a northern bypass of the New Orleans metropolitan area and an alternate route for I-10, which serves the city of New Orleans itself.
Louisiana Highway 109 is a state highway located in southwestern Louisiana that runs 40.0 miles (64.4 km) in a north–south direction from U.S. Highway 90 and LA 3112 southwest of Vinton to LA 27 at Juanita, a point north of DeQuincy. A largely rural route, LA 109 parallels the Texas–Louisiana border and passes through the community of Starks in Calcasieu Parish where it intersects LA 12. The southern terminus of LA 109 is located just north of I-10 between Orange, Texas and Vinton, Louisiana.
Louisiana Highway 142 (LA 142) is a state highway located in Morehouse Parish, Louisiana. It runs 8.75 miles (14.08 km) in a north–south direction from U.S. Highway 425 (US 425) north of Bastrop through Beekman to the Arkansas state line.
Louisiana Highway 136 (LA 136) is a state highway located in Ouachita Parish, Louisiana that runs 3.50 miles (5.63 km) in a north–south direction from LA 134 at Fairbanks to a junction with U.S. Highway 165 (US 165) and LA 2 at the eastern limit of Sterlington.
Louisiana Highway 104 is a state highway located in southwestern Louisiana. It runs 41.4 miles (66.6 km) in a west–east direction from LA 26 southeast of Oberlin to U.S. Highway 190 in Opelousas. Along the way, it passes through the town of Mamou and intersects various north–south routes that service points along US 190 such as Elton, Basile, and Eunice. East of Mamou, connections are also made to Ville Platte, the St. Landry Parish seat, on US 167/LA 10.
Louisiana Highway 106 is a state highway located primarily in Evangeline Parish that runs 24.2 miles (38.9 km) in a west–east direction from LA 10 east of Oakdale to LA 29 south of Bunkie. Along the way, LA 106 passes through the towns of Pine Prairie and St. Landry and intersects U.S. Highway 167. Near the east end of its route, LA 106 passes through an interchange with Interstate 49 (I-49) between Opelousas and Alexandria in the southwest corner of Avoyelles Parish.
Louisiana Highway 138 (LA 138) is a state highway located in Morehouse Parish, Louisiana. It runs 12.74 miles (20.50 km) in a north–south direction from LA 134 south of Collinston to a junction with U.S. Highway 165 (US 165), U.S. Highway 425 (US 425), and LA 2 in Mer Rouge.
1 2 Union Parish (West Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 16, 2013.
↑ Union Parish (East Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 16, 2013.
↑ Ouachita Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 16, 2013.
↑ Morehouse Parish (West Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved September 29, 2013.
↑ Concordia 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.
↑ Tensas Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 16, 2013.
↑ Richland Parish (East Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 16, 2013.
↑ West Carroll Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 16, 2013.
↑ East Carroll Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 16, 2013.
↑ Richland Parish (West Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved September 29, 2013.
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LA 2 – Bernice, Farmerville 
LA 15 – Spearsville, Farmerville 
CR 32 (Hillsboro Road) – Hillsboro 
