Louisiana Highway 3 is a state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 in northern Louisiana

Louisiana

Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...

 and runs in a north/south direction for 35.63 miles (57.3 km), from Interstate 20

Interstate 20

Interstate 20 is a major east–west Interstate Highway in the Southern United States. I‑20 runs 1,535 miles from near Kent, Texas, at Interstate 10 to Florence, South Carolina, at Interstate 95...

 to the Louisiana/Arkansas

Arkansas

Arkansas is a state located in the southern region of the United States. Its name is an Algonquian name of the Quapaw Indians. Arkansas shares borders with six states , and its eastern border is largely defined by the Mississippi River...

 state line. LA 3 lies entirely within Bossier Parish. LA 3 is designated as a Louisiana Scenic Byway.

Route description

From the south, LA 3 begins as a four lane, divided highway in Bossier City at an off ramp on Interstate 20

Interstate 20

Interstate 20 is a major east–west Interstate Highway in the Southern United States. I‑20 runs 1,535 miles from near Kent, Texas, at Interstate 10 to Florence, South Carolina, at Interstate 95...

 and crosses Louisiana Highway 72 in two places, the first from the LA 3 and the other from Louisiana Highway 3 Spur, a 0.31 mile (0.4988954 km) connector road that connects the two highways. LA 3 heads due north through Bossier Parish. LA 3 also intersects U.S. Highway 79 and Interstate 220

Interstate 220 (Louisiana)

Interstate 220 in Louisiana is an east–west bypass route around Shreveport, Louisiana in the northwestern corner of the state.-Route description:...

 before it exits the city limits. From there, the highway spans almost due north to the Arkansas line, where LA 3 becomes Highway 29.