Following construction of a new alignment US 82 in the vicinity of Magnolia, Waldo, and McNeil, the Arkansas State Highway Commission created the US 82B designation in Magnolia on May 29, 1970 along the former alignment of US 82 through downtown Magnolia.. The designation was officially approved by AASHTO on June 25, 1973. It was decommissioned on May 20, 2019.
