Shortly afterward, LA 3210 reaches its terminus as it rejoins the divided four-lane US 425/LA 15.

After curving to the northeast, the highway has a folded diamond interchange with LA 18 just before ascending onto the Mississippi River bridge at Wallace.

[12] The route is a short connector that is also the location of an Occidental Chemical Corporation facility.

[13] The route is a short connector between US 90 and its pre-freeway alignment (LA 182) between Franklin and Centerville.

[14] The route is a short connector located on the southeast side of LaPlace just east of the Bonnet Carre Spillway.

[15] The route is the state-maintained approach to the bridge, built in 1930 and now closed to vehicular traffic.

[20] It was the original route of US 71 and US 167, as well as the earlier Jefferson Highway auto trail, before being moved onto the present freeway alignment in 1981.

Louisiana Highway 3231 (LA 3231) ran 0.5 miles (0.80 km) in an east–west direction along Jefferson Paige Road from I-220 to the concurrent US 79 and US 80 in Shreveport, Caddo Parish.

[27] The route was a short connector between US 79-80 and a diamond interchange with I-220, returned to local control after a reconstruction and realignment project in the 2000s.

The route heads due east and immediately passes through a diamond interchange with I-55.

LA 3234 continues onto University Avenue as an undivided four-lane highway with a center turning lane and intersects US 51 (North Morrison Boulevard) upon entering the Hammond city limits.

It then bisects the SLU campus and passes the school's University Center arena.

After crossing the Canadian National Railway (CN) line at grade, the route proceeds a short distance further to a T-intersection at LA 1065 (North Cherry Street).

It was an undivided two-lane highway, widening to accommodate a median immediately south of LA 39.

Except for a very short concurrency with a paved local road, the entire route was gravel during its time as a State highway.

[39][40] Louisiana Highway 3242 (LA 3242) runs 5.56 miles (8.95 km) from Loreauville to Dauterive Landing.

[42] The route headed north on O'Neal Lane from its intersection with South Harrell's Ferry Road.

After 1 mile (1.6 km), LA 3245 passed the Baton Rouge campus of Ochsner Medical Center immediately followed by a diamond interchange with I-12 at Exit 7.

LA 3245 was an undivided four-lane highway with a center turning lane for its entire length.

[45] The route begins at an intersection at which LA 42 turns east from Burbank Drive onto Highland Road.

LA 3246 heads north on Siegen Lane, the continuation of Burbank Drive, initially as a divided four-lane highway through a suburban residential area southeast of Baton Rouge.

After intersecting LA 427 (Perkins Road), the highway crosses over the Kansas City Southern Railway (KCS) line and passes through a diamond interchange with I-10 at Exit 163.

LA 3246, now a primarily commercial thoroughfare, widens to an undivided six-lane highway with a center turning lane for the remainder of its route.

It proceeds northward to its terminus at US 61/LA 73 (Airline Highway) in an area on the Baton Rouge city limits known as Nesser opposite South Sherwood Forest Boulevard.

As of 2018, it is under agreement to be removed from the state highway system and transferred to local control.

[49] The route consists of the state-maintained portion of Well Road running through the partial cloverleaf interchange on I-20 at Exit 112 and connecting with US 80/LA 15.