Louisiana Highway 3250 (LA 3250) runs 0.50 miles (0.80 km) in a southwest to northeast direction along Sugar House Road from the concurrent US 71/US 167 Bus.

[2] The route connects an industrial area situated near the Mississippi River with LA 30 about one mile (1.6 km) west of an interchange with I-10 (exit 177).

Louisiana Highway 3253 (LA 3253) runs 0.80 miles (1.29 km) in a southeast to northwest direction from the I-49/US 167 service road to a junction with US 190 in Opelousas.

[4] The route is a remnant of the original alignment of LA 31, which was relocated when US 167 was upgraded to a controlled-access highway as part of the construction of I-49 during the 1980s.

[5] The route's mileposts increase from the eastern end contrary to common practice.

Louisiana Highway 3256 (LA 3256) runs 3.07 miles (4.94 km) in a general east–west direction from US 90 to the I-10 service road east of Lake Charles.

Louisiana Highway 3258 (LA 3258) runs 3.76 miles (6.05 km) in an east–west direction from the I-10 service road west of Iowa, Calcasieu Parish to a second junction with the service road west of Lacassine, Jefferson Davis Parish.

Louisiana Highway 3260 (LA 3260) ran 0.78 miles (1.26 km) in an east–west direction along West Church Street from US 190 to US 51 in Hammond.

[11] LA 3260 continued the trajectory of US 190 as the latter makes a slight S-curve heading east toward downtown Hammond.

The route provided a more direct connection between southbound US 51 and westbound US 190 to I-55 than their actual junction located 0.3 miles (0.48 km) to the south.

The crossing was closed to traffic in June 1957 following the completion of the parallel Causeway Boulevard (LA 3046) overpass.

[17] The route began on the north side of LA 3139 (Earhart Expressway) and headed north on Labarre Road across US 61 (Airline Drive) to its terminus at LA 611-9 (Metairie Road) in a neighborhood known as Old Metairie.

The crossing was closed to traffic in June 1957 following the completion of the parallel Causeway Boulevard (LA 3046) overpass.

Louisiana Highway 3265 (LA 3265) runs 2.93 miles (4.72 km) in an east–west direction along Robinson Bridge Road from US 165 to a point east of I-49 in Woodworth.

LA 3266 heads north as an undivided two-lane highway until reaching its terminus at Forty Arpent Road.

[24] The route heads north on South Airline Avenue from LA 44 (Jefferson Highway) through the town of Gramercy.

Louisiana Highway 3275 (LA 3275) runs 0.37 miles (0.60 km) in a north–south direction along Sterlington Road, consisting of a partially one-way connector between US 165 and the concurrent US 80/US 165 Bus.

[25] The route's mileposts increase from the northern end contrary to common practice.

Louisiana Highway 3276 (LA 3276) runs 4.79 miles (7.71 km) in an east–west direction along Stonewall–Frierson Road from US 171 in Stonewall to a point east of I-49.

[27] The route was renumbered in 1994 from its original designation as LA 371 to prevent a numerical duplication with the newly commissioned US 371.

It facilitates access from northbound LA 1 to the Red River Lock and Dam opposite Colfax.

Louisiana Highway 3280 (LA 3280) runs 0.18 miles (0.29 km) in an east–west direction, consisting solely of the state-maintained Endom Bridge across the Ouachita River constructed in 2003.

[30][31] The route's mileposts increase from the eastern end contrary to common practice.

[32] The route's mileposts increase from the eastern end contrary to common practice.