It then resumes its original direction before passing through Leleux and crossing a bridge over Bayou Queue De Tortue into Acadia Parish.

Truck traffic on LA 13 is directed to follow eastbound US 90 straight ahead onto North Eastern Avenue, bypassing the business section.

[2][5][6] Mainline LA 13 turns west onto East 2nd Street and follows westbound US 90 for seven blocks to an intersection with North Parkerson Avenue.

Here, US 90 continues west toward Jennings while LA 13 turns northwest onto North Parkerson Avenue, a divided two-lane thoroughfare.

LA 13 then passes through a diamond interchange with I-10 at Exit 80, connecting to Lake Charles on the west and Lafayette on the east.

[2][5][6] North of Crowley, LA 13 crosses a bridge over Bayou Plaquemine Brule and narrows to an undivided two-lane highway.

It immediately crosses the Acadiana Railway (AKDN) tracks at grade and intersects LA 3116 (East Ardoin Street) a second time.

In the center of town, LA 13 intersects US 190 (West/East Laurel Avenue), connecting to Basile on the west and Opelousas on the east.

[2][5][7] Just north of the city limits is an intersection with LA 29, which heads northeast through Chataignier toward Ville Platte, the parish seat.

LA 13 then makes a bend to the northwest before proceeding due north across Bayou Des Cannes and into Evangeline Parish, where it becomes known as Veterans Memorial Highway.

Most of the route is classified by the Louisiana Department of Transportation and Development (La DOTD) as a rural minor arterial.

The heaviest-traveled sections of the route are located within the city limits of Crowley and Eunice and are classified as urban principal arterials.

The highest numbers reported were for the section connecting Crowley's downtown area with I-10, which averaged 19,200 vehicles per day.

[15][16] By 1928, Route 26 had been extended south along the modern LA 35 corridor from Kaplan to Forked Island at the Gulf Intracoastal Waterway.

[28] All four right-angle turns were eliminated when the current alignment was constructed in the early 1970s, smoothing the route and relocating the junction with LA 29.

[31] About 1971, a more direct route was opened, skirting the western edge of Mamou and continuing north of town along the opposite side of a railroad line that has since been abandoned.

The later abandonment of the railroad line also eliminated the need for LA 13 to zigzag across the tracks approaching Turkey Creek to intersect US 167.

While LA 13 turns west onto East 2nd Street, running concurrent with westbound US 90, the truck route proceeds straight ahead to follow eastbound US 90 onto North Eastern Avenue.

At this intersection, signage directs motorists to continue onto northbound LA 1111 to I-10 at Exit 82, connecting to Lake Charles and Lafayette.

[33] The portion of the route shared with US 90 is classified by the La DOTD as an urban minor arterial with an average daily traffic volume of 10,600 vehicles in 2013.