This trend continues for 0.8 miles (1.3 km) to an intersection with LA 1088, a lateral highway connecting Mandeville with I-12 on the east side of town.

[2][3][4] LA 59 continues northeast through an area of mixed rural and newer residential development and turns due north 1.8 miles (2.9 km) later.

After passing the entrances to several sprawling school campuses, LA 59 goes through a diamond interchange with I-12, which connects to Hammond on the west and Slidell on the east.

North of I-12, the surroundings change from residential to an area featuring several small industrial parks as well as the St. Tammany Parish Administrative Complex.

The highway resumes its regular course and, 1.8 miles (2.9 km) later, enters the small town of Abita Springs at an intersection with Harrison Avenue, a local road.

LA 59 officially crosses the town limits after 0.7 miles (1.1 km) and continues north through a thick pine forest with scattered residential development.

[3][10][11] In August 2007, the main junction in Abita Springs, previously governed by a traffic signal, was converted to a roundabout by the state highway department.

[13] La DOTD is currently engaged in a program that aims to transfer about 5,000 miles (8,000 km) of state-owned roadways to local governments over the next several years.[when?