From the south, LA 9 Truck begins at an intersection with mainline LA 9 and US 79, connecting with Arcadia to the southeast and Minden to the southwest, respectively. The route proceeds north co-signed with US 79 Bypass and travels along the west side of Homer. After , US 79 Bypass and LA 9 Truck turn east to follow LA 2 along the north side of town. Shortly after crossing the Louisiana and North West Railroad (LNW) line, the US 79 Bypass designation ends upon re-joining its parent route. LA 9 Truck continues southeast with LA 2 for another to an intersection with mainline LA 9 on the northeast side of Homer.