The route heads north along the west bank levee of the Atchafalaya River through Krotz Springs, where it crosses under US 190 between Baton Rouge and Opelousas. LA 105 proceeds north along the river for 10.9 miles (17.5 km) and makes a brief zigzag via LA 10 in Melville. Continuing north from Melville, LA 105 passes through Bayou Current and intersects LA 360.[2][3][4] It then crosses from St. Landry Parish into Avoyelles Parish and continues 10.4 miles (16.7 km) more to LA 1 at the foot of the Atchafalaya River Bridge at Simmesport.[2][5][6]
The route heads north from US 190 and crosses from Allen Parish into Beauregard Parish after 5.5 miles (8.9 km).[7][8][9] North of Dry Creek and Bundick is an intersection with LA 26, connecting to DeRidder and Oberlin. Before curving northeast into Vernon Parish, LA 113 intersects LA 112 at Sugartown.[7][9][10] Reaching the community of Pitkin, LA 113 turns east to follow LA 10 briefly before splitting again to the northeast.[6][7][11] The highway begins to take a more easterly course as it crosses into Rapides Parish. At Union Hill LA 113 has a second junction with LA 112. Near the end of its route, LA 113 zigzags to the south and east into Glenmora, its final destination.[6][7][12]
Louisiana Highway 120 (LA 120) exists in two sections, running a total of 36.24 miles (58.32 km) in an east–west direction. The western section extends from US 171 in Zwolle, Sabine Parish to a point just south of Robeline, Natchitoches Parish.[17] The eastern section extends from LA 117 in Provencal to a junction with LA 1 and LA 494 south of Natchez, Natchitoches Parish.[18]
The route heads east from LA 4 and intersects the concurrent US 425 and LA 15 in Gilbert. LA 128 turns north to follow US 425/LA 15 briefly before splitting to the northeast toward Como. Here, it intersects LA 4 once again and runs concurrent with that highway east across the Tensas River, where it crosses from Franklin Parish into Tensas Parish.[23][24][25] Shortly afterward, LA 128 separates from LA 4 and heads southeast to a point known as Avondale. LA 128 makes a zigzag via US 65 then proceeds south to its terminus in St. Joseph.[23][25][26]
Louisiana Highway 148 (LA 148) exists in two sections, running a total of 15.65 miles (25.19 km) in an east–west direction. The western section extends from a junction with US 167 and LA 818 at Clay to LA 146 at Vernon, Jackson Parish.[37] The eastern section extends from a point southwest of Eros, Jackson Parish, to the Ouachita Parish line.[38]
Louisiana Highway 149 (LA 149) runs 2.74 miles (4.41 km) in a north–south direction along R.W.E. Jones Drive in Grambling, Lincoln Parish.[39] It serves as the principal north–south thoroughfare through the town and connects Grambling State University to both I-20 and the parallel US 80.
The route begins at US 80 near the southern limit of Grambling, an area known as Grambling Corners. LA 149 heads north as an undivided two-lane highway through a rural residential area. After a short distance, the highway widens to four lanes as it begins to pass through the middle of the Grambling State University campus. At College Avenue, LA 149 exits the campus and becomes a two-lane highway once again. It then crosses the Kansas City Southern Railway (KCS) tracks via an overpass and intersects LA 150 (West Martin Luther King Jr. Avenue). LA 149 then curves to the northeast and passes through an interchange with I-20 at Exit 81, leading toward Monroe and Shreveport. State maintenance ends immediately afterward at an intersection with Parish Road 333 (North Pinetree Road), and R.W.E. Jones Drive proceeds northward as a local road.[39][40][41]
^St. Landry Parish (East Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 20, 2013.
^Avoyelles Parish (South Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 20, 2013.
^Allen Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 20, 2013.
^Beauregard Parish (East Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 20, 2013.
^Vernon Parish (East Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 20, 2013.
^Rapides Parish (West Section)(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 20, 2013.
^Franklin Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 20, 2013.
^Tensas Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 20, 2013.
^ abLincoln Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved October 31, 2013.
^Lincoln Parish (Map) (January 1, 1955 ed.). Cartography by Department of Highways Traffic and Planning Section. Louisiana Department of Highways. 1948.
^"Act No. 40, House Bill No. 311". State-Times. Baton Rouge. June 18, 1955. pp. 3B–4B.
^Lincoln Parish (Map) (January 1, 1958 ed.). Cartography by Department of Highways Traffic and Planning Section. Louisiana Department of Highways. 1956.
^Louisiana (Map). Cartography by Louisiana Department of Highways. Louisiana Department of Highways. 1960.
^Louisiana (Map). Cartography by Louisiana Department of Highways. Louisiana Department of Highways. 1963.