List of state highways in Louisiana (450–499)

The following is a list of state highways in the U.S. state of Louisiana designated in the 450-499 range.

Louisiana Highway 454

Louisiana Highway 454 (LA 454) runs 13.75 miles (22.13 km) in a general east–west direction from LA 107 at Cedar Grove, Rapides Parish to LA 107 and LA 115 in Effie, Avoyelles Parish.

LA 454 initially heads southeast from LA 107 (Old Marksville Highway) in Cedar Grove toward the Red River. After passing through an area known as Ruby, the route curves to the east and crosses from Rapides Parish into Avoyelles Parish. LA 454 then loops back to the northeast to a terminus at the concurrent LA 107 and LA 115 in Effie.

Louisiana Highway 456

Louisiana Highway 456 (LA 456) runs 7.12 miles (11.46 km) in a north–south direction from US 71 at Loyd to LA 470 at Lamourie, Rapides Parish.

The entire route closely parallels US 71 (largely co-signed with US 167), running on the opposite side of the Union Pacific Railroad tracks through Meeker and Lecompte to Lamourie. In Lecompte, an intersection with LA 112 (Wall Street) connects to nearby I-49. LA 456 served as the original alignment of US 71 and its predecessor, the Jefferson Highway auto trail. It is an undivided two-lane highway for its entire length.