From the west, LA 3003 begins at LA 1032 (4-H Club Road) just south of the latter's intersection with US 190. It heads southeast on Rushing Road and intersects LA 3002 (South Range Avenue). LA 3003 continues along the north side of I-12 to its terminus at LA 16 (Pete's Highway).
LA 3003 is an undivided two-lane highway for its entire length.
Louisiana Highway 3011 (LA 3011) runs 1.50 miles (2.41 km) in a north–south direction along Grand Caillou Road in Dulac, Terrebonne Parish.
The route begins at a point where Grand Caillou Road transitions from parish to state maintenance and proceeds northeast along the east bank of Bayou Caillou. It then turns to the east and terminates at LA 57 (Bayou Sale Road). It is an undivided, two-lane highway for its entire length. LA 57 continues south toward Cocodrie and also straight ahead and to the north across Bayou Dulac toward Houma.
The route begins at an intersection with the US 90 Business (Westbank Expressway) service roads below the high-level Harvey Canal bridge and heads north, running west of and parallel to the canal, to LA 18 (4th Street). LA 3018 serves the La DOTD Harvey Tunnel Maintenance Yard and is an undivided, two-lane highway for its entire length.
The route begins on the east side of the 17th Street Canal bridge at the Jefferson–Orleans parish line and proceeds east along Veterans Highway, the continuation of Veterans Memorial Boulevard in New Orleans. Eastbound traffic turns south onto Pontchartrain Boulevard and immediately enters an interchange with I-10 and I-610. Westbound traffic utilizes parallel West End Boulevard. LA 3019 is a divided, six-lane highway on Veterans Highway and a divided, four-lane highway on Pontchartrain and West End Boulevards.
The route begins at North Claiborne Avenue, a junction with LA 39 and LA 46, and proceeds north along Elysian Fields Avenue. LA 3021 engages in interchanges with both I-10 and I-610, passing over the Norfolk Southern Railway (NS) tracks in between, before ending at US 90 (Gentilly Boulevard). It is a six-lane, divided highway for its entire length.
LA 3021 is a vestige of the original plans for the Eastern Expressway, incorporated into the route for I-10 by the time of its construction in the 1960s, which would have connected Eastern New Orleans with North Claiborne Avenue via an expressway in the median of Elysian Fields Avenue. In the pre-1955 state highway system, the proposed route was given the temporary designation of State Route C-2200, changed to LA 3021 in the 1955 Louisiana Highway renumbering. The Elysian Fields Avenue segment, as well as a segment of Morrison Road that is now LA 1253, were ultimately left out of the expressway plans. Though never connected, both retained the LA 3021 designation until the latter segment was given its own number in 2002.
The route heads southeast from LA 408 (Hooper Road) along Sullivan Road. It then turns east onto Wax Road, which transitions onto Magnolia Bridge Road. The route ends at an intersection with LA 37/LA 64 (Greenwell Springs Road) just west of the Amite River.
LA 3034 is an undivided two-lane highway for its entire length.
^ abHighway District No. 2: Official Control Section Map / Construction and Maintenance (Map). Cartography by Department of Highways Traffic and Planning Section. Louisiana Department of Highways. January 1, 1958.
^ abOrleans Parish(PDF) (Map). Cartography by La DOTD Office of Multimodal Planning. Louisiana Department of Transportation and Development. February 2012. Retrieved April 8, 2013.