Louisiana Highway 3 (LA 3) is a state highway located in Bossier Parish, Louisiana. It runs in a north–south direction from the junction of Interstate 20 (I-20), U.S. Highway 71 (US 71), and LA 72 in Bossier City to the Arkansas state line north of Plain Dealing. 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. Route description From the south, LA 3 begins at an intersection with LA 72 (Old Minden Road) in Bossier City. Opposite this intersection are ramps leading to a partial interchange with I-20 and US 71 at the point where the two highways begin a concurrency across the Red River westward into Shreveport. Traffic from southbound LA 3 can enter I-20 westbound only (concurrent with northbound US 71), and traffic from eastbound I-20 (concurrent with southbound US 71) can exit to LA 3 north at exit 20B. All movements are allowed between LA 3 and US 71. From this intersection, LA 3 proceeds north along Benton Spur, an undivided four-lane thoroughfare with a center turning lane, and continues onto an overpass across the Kansas City Southern Railway (KCS) tracks. It then intersects the concurrent US 79/US 80 at East Texas Street. US 79 and US 80 head west across the Red River into Shreveport and eastward parallel to I-20 into Minden. LA 3 continues northward and enters an interchange with I-220 (exit 11), a northern bypass of Shreveport that connects to I-20 westbound toward Dallas, Texas and eastbound toward Monroe. Shortly after this interchange, LA 3 crosses out of the Bossier City limits, and the center turning lane is replaced by a median. Over the next , LA 3 continues northward, closely following the Union Pacific Railroad (UP) tracks through points such as Vanceville and Willow Chute, before entering Benton, the seat of Bossier Parish. Upon entering town, LA 3 narrows to an undivided four-lane highway. At 5th Street, LA 3 intersects LA 162, which heads east toward the Cypress-Black Bayou Recreation Area. LA 3 narrows again to an undivided two-lane highway just before crossing out of Benton and remains