LA 12 intersects LA 389 (Cole Street) at the latter's southern terminus then makes a jog across the railroad tracks onto East 4th Street, entering the city's historic district. Signs direct visitors to the DeQuincy Railroad Museum, located one block to the north at the convergence of two branches of the KCS Railway. Shortly after a second grade crossing, LA 12 intersects LA 27, which heads northward along Page Street toward DeRidder.
LA 12 connects with LA 389 (Cole Street) at its southern end and then makes a turn across railroad tracks to enter the city's historic district. Signs guide visitors to the DeQuincy Railroad Museum, located one block north at the intersection of two KCS Railway branches. Shortly after a second-grade crossing, LA 12 intersects LA 27, which heads northward along Page Street toward DeRidder.