Alternate US-412 was marked as "Scenic US-412" prior to 2012. This was one of only two scenic special routes in the country, the other being U.S. Route 40 Scenic in Maryland. Maps usually still marked the road as "Alternate US-412", however. Scenic US-412 was originally part of State Highway 33.
US Route 412 Business (US 412B) is a business route of 4.65 miles (7.48 km) in Hindsville. The route has its northern terminus is at US 412/Arkansas Highway 45 north of Hindsville. Posted as US 412B, the route runs through Hindsville, meeting AR 45 south before terminating at US 412 southeast of Hindsville. It was created in 2007 following completion of a 4 lane bypass around the east side of town.
U.S. Route 412 Business (US 412B) is a business route of 5.48 miles (8.82 km) in Huntsville, Arkansas. The route begins at US 412 west of Huntsville and runs east through town as Main Street. US 412B has a junction with AR 74 before it passes the Madison County Courthouse. The road continues east, forming a concurrency with Arkansas Highway 23 north for 0.5 miles (0.80 km) before the two roads diverge. The highway continues another 1.87 miles (3.01 km) before terminating at US 412 east of Hunstville.