 LA 3 connects Bossier City, the largest city in Bossier Parish, with the town of Benton, the parish seat.Apart from the interchange with I-20 and US 71 at its southern terminus, LA 3 also connects to I-220, the northern bypass of Shreveport and Bossier City.North of Benton, LA 3 passes through Plain Dealing, where it intersects LA 2, Louisiana's northernmost cross-state route.