# Louisiana Highway 31

Louisiana Highway 31 (LA 31) is a 54.6-mile-long (87.9 km) north–south state highway in Louisiana that serves Iberia, St. Martin, and St. Landry parishes, extending from LA 182 in New Iberia, and ending at the same highway in Opelousas.

## Route description

From the south, LA 31 begins at a junction with LA 182 in New Iberia. After a short distance, the route begins to travel along the west bank of Bayou Teche. LA 31 crosses from Iberia Parish into St. Martin Parish near a junction with LA 86. Passing through the historic town of St. Martinville, LA 31 briefly overlaps LA 96. Continuing northward, LA 31 makes a jog in the tiny community of Parks and follows a western bend in Bayou Teche. In the town of Breaux Bridge, LA 31 makes another jog and crosses LA 94. At the north end of town, the highway crosses but does intersect I-10, the main highway across southern Louisiana. Access to the interstate is instead provided by LA 328 on the opposite bank of Bayou Teche.
LA 31 continues to meander along several bends in the bayou, passing opposite Cecilia en route to Arnaudville. Here, the highway intersects the eastern terminus of LA 93, connecting with nearby I-49. Immediately afterward, LA 31 switches to the opposite bank of Bayou Teche and proceeds northwest to Leonville, where it intersects LA 103. A few miles later, LA 31 leaves the path of Bayou Teche and eventually comes to a T-intersection with LA 742. The highway turns due west, enters the city limits of Opelousas, and passes through a diamond interchange with I-49. LA 31 proceeds on Creswell Lane a short distance further to its junction with LA 182 a few blocks south of the downtown area.

## Major intersections

| Parish | Location | mi | km | Destinations | Notes |
| Iberia | New Iberia | 0.0 | 0.0 | LA 182 (West St. Peter Street, West Main Street) – Jeanerette, Lafayette | Southern terminus; one-way pair |
| Iberia | New Iberia | 0.6 | 0.97 | LA 677 (North Landry Drive) | |
| Iberia | ​ | 2.6 | 4.2 | LA 86 – Loreauville, Lake Dauterive | Northern terminus of LA 86 |
| St. Martin | Cinco | 6.7 | 10.8 | LA 92-1 (Smede Highway) – Cade | |
| St. Martin | St. Martinville | 8.6 | 13.8 | LA 96 west (Port Street) – Broussard, Lafayette | Southern end of LA 96 concurrency |
| St. Martin | St. Martinville | 8.7 | 14.0 | LA 96 east (Bridge Street) | Northern end of LA 96 concurrency |
| St. Martin | St. Martinville | 10.0 | 16.1 | LA 353 (Cypress Island Highway) – Cypress Island | Eastern terminus of LA 353 |
| St. Martin | Parks | 15.2 | 24.5 | LA 350 (Bridge Street) | Western terminus of LA 350 |
| St. Martin | Ruth | 19.0 | 30.6 | LA 351 | Western terminus of LA 351 |
| St. Martin | Breaux Bridge | 21.9 | 35.2 | LA 336-1 east (East Bridge Street) to I-10 – Cecilia | Southern end of LA 336-1 concurrency |
| St. Martin | Breaux Bridge | 22.0 | 35.4 | LA 336-1 west (West Bridge Street) | Northern end of LA 336-1 concurrency |
| St. Martin | Breaux Bridge | 22.9 | 36.9 | LA 94 (Mills Avenue) – Cecilia, Lafayette | |
| St. Martin | ​ | 27.4 | 44.1 | LA 341 (DeClouet Highway) | Southern terminus of LA 341 |
| St. Martin | Cecilia | 30.7 | 49.4 | LA 355 (Cecilia Bridge Highway) – Cecilia | Western terminus of LA 355 |
| St. Martin | ​ | 33.3 | 53.6 | LA 354 (DeClouet Highway) | Northern terminus of LA 354 |
| St. Martin | Arnaudville | 37.2 | 59.9 | LA 93 (Courtableau Street) – Sunset | Northern terminus of LA 93 |
| St. Landry | Arnaudville | 37.3 | 60.0 | LA 347 north (Fuselier Street) | Southern end of LA 347 concurrency |
| St. Landry | Arnaudville | 37.4 | 60.2 | Bridge over Bayou Teche | Bridge over Bayou Teche |
| St. Landry | Arnaudville | 37.4 | 60.2 | LA 347 south (Fuselier Street) | Northern end of LA 347 concurrency |
| St. Landry | ​ | 43.1 | 69.4 | LA 741 – Krotz Springs, Baton Rouge | Southern terminus of LA 741 |
| St. Landry | Leonville | 45.0 | 72.4 | LA 103 – Port Barre | Southern terminus of LA 103 |
| St. Landry | Leonville | 45.1 | 72.6 | Bridge over Bayou Teche | Bridge over Bayou Teche |
| St. Landry | Leonville | 45.3 | 72.9 | LA 347 / LA 3254 | Northern terminus of LA 347; western terminus of LA 3254 |
| St. Landry | ​ | 52.3 | 84.2 | LA 742 – Port Barre | Western terminus of LA 742 |
| St. Landry | Opelousas | 53.7 | 86.4 | I-49 / US 167 – Lafayette, Alexandria | Exit 18 on I-49/US 167 |
| St. Landry | Opelousas | 54.6 | 87.9 | LA 182 (South Union Street) | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus ||||||