LA 550 then curves northward and passes through Laran before crossing the Arkansas state line.

Its northern terminus at LA 549 is located 1.08 miles (1.74 km) south of the Arkansas state line.

It continues eastward then makes a sharp curve to the south near its eastern terminus at LA 138.

[15] The route heads north from LA 15 at a point about 2.0 miles (3.2 km) east of Spearsville.

Louisiana Highway 560 (LA 560) is a collection of two current and two former state-maintained streets in Marrero and Crown Point, Jefferson Parish.

Louisiana Highway 561 (LA 561) runs 11.78 miles (18.96 km) from Hebert to Richland Parish.

Louisiana Highway 565 (LA 565) runs 28.54 miles (45.93 km) from Wildsville to Deer Park.

Louisiana Highway 569 (LA 569) runs 12.24 miles (19.70 km) from Spokane to Lake St. John.

Louisiana Highway 582 (LA 582) runs 16.93 miles (27.25 km) from Redwing to Lake Providence.

Louisiana Highway 583 (LA 583) runs 10.47 miles (16.85 km) from Bee Bayou to Hegwood Island.

[4][44][45] It then zigzags northward across LA 2 at Goodwill to a point on the Boeuf River west of Oak Grove.

It then zigzags east and north to Fiske, where it begins to take a winding course parallel to the Boeuf River to LA 835 near Concord.

Louisiana Highway 588 (LA 588) runs 17.40 miles (28.00 km) in East Carroll Parish.

Louisiana Highway 589 (LA 589) runs 12.99 miles (20.91 km) in East Carroll Parish.

It travels through sparsely populated areas until passing just west of the Morehouse Memorial Airport, entering the city of Bastrop.

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.

The highway crosses over I-20 and immediately intersects 18th Street, connecting to a tight diamond interchange with the interstate.

It intersects US 80 as it passes Ouachita Parish High School and continues north through Swartz to its terminus at LA 139.

[57] The route heads north from the concurrent US 80 and LA 133 in Start, a small community in northwestern Richland Parish.

Louisiana Highway 596 (LA 596) runs 10.70 miles (17.22 km) in a north–south direction from US 65 in Lake Providence to a second junction with US 65 at Panola, East Carroll Parish.