Louisiana Highway 950 (LA 950) consisted of 17 road segments with a total length of approximately 16.3 miles (26.2 km) that were located in the city of Baton Rouge, East Baton Rouge Parish.

Louisiana Highway 951 (LA 951) consisted of approximately 2.6 miles (4.2 km) of driveways within the East Louisiana State Hospital grounds and detached forensic facility off of LA 10 in Jackson, East Feliciana Parish.

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

[6] Though signed in the field, the concurrency with LA 412 at its southern end is not counted in the official route mileage, resulting in a slightly shorter figure of 17.11 miles (27.54 km).

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

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

Louisiana Highway 964 (LA 964) runs 15.28 miles (24.59 km) in a general southeast to northwest direction from US 61 north of Baton Rouge, East Baton Rouge Parish to a local road at Riddle, West Feliciana Parish.

[15] As of 2018, a portion of LA 964 is under agreement to be removed from the state highway system and transferred to local control.

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

Prior to the 1955 Louisiana Highway renumbering, LA 972 was designated as State Route C-1372.

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

Louisiana Highway 975 (LA 975) runs 17.90 miles (28.81 km) in a north–south direction primarily along the Atchafalaya River levee from a point south of I-10 in Iberville Parish to an interchange with US 190 in Pointe Coupee Parish opposite Krotz Springs.

[31][32] The route's local name recalls Isaac Bigman, a plantation owner from the early 1900s.

Bigman owned a plantation at the end of present-day LA 978 and was also a local merchant in the area.

Francisville Ferry closed due to the opening of the John James Audubon Bridge.

Prior to the 1955 Louisiana Highway renumbering, LA 982 was part of State Route 135.

Louisiana Highway 983 (LA 983) runs 9.30 miles (14.97 km) in a north–south direction from the concurrent US 190/LA 1 southeast of Erwinville, West Baton Rouge Parish to LA 414 at Chenal, Pointe Coupee Parish.

Prior to the 1955 Louisiana Highway renumbering, LA 985 was part of State Route C-1408.

Louisiana Highway 987 (LA 987) currently consists of five road segments with a total length of 4.68 miles (7.53 km) that are located in the city of Port Allen and an unincorporated area of West Baton Rouge Parish to the north.

Louisiana Highway 989 (LA 989) consists of two road segments with a total length of 7.43 miles (11.96 km) that are located in the West Baton Rouge Parish town of Brusly and an unincorporated area between Brusly and the neighboring town of Addis.

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

Prior to the 1955 Louisiana Highway renumbering, LA 990 was designated as State Route 133.

Louisiana Highway 992 (LA 992) currently consists of one road segment with a total length of 2.72 miles (4.38 km) that is located in and near the Iberville Parish city of Plaquemine.

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

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

Louisiana Highway 999 (LA 999) runs 1.29 miles (2.08 km) in a northwest to southeast direction along Lula Road from the Lula Sugar Factory to a junction with LA 1 north of Paincourtville.

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