Complex sentence: The road then turns southward and winds through largely uninhabited swampland until its terminus at LA 182 mere feet from its junction with US 90 (future Interstate 49).
Split into simpler sentences: The road then turns southward and winds through largely uninhabited swampland until its terminus at LA 182. At this point, LA 182 is mere feet from its junction with US 90 (future Interstate 49).