Louisiana Highway 550 (LA 550) runs 18.89 miles (30.40 km) 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 (1.74 km) 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 (12.91 km) 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 (4.2 km) 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]
Louisiana Highway 558 (LA 558) runs 5.94 miles (9.56 km) in a north–south direction along Iron Mountain Road from
LA 15 in
Mount Union to the
Arkansas state line at
Lockhart,
Union Parish.[15]
The route heads north from LA 15 at a point about 2.0 miles (3.2 km) 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 (4.8 km). 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 (19.52 km) 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 (12.89 km) 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 (27.73 km) 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 (5.49 km) 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]
^
abUnion 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.