sentences:  The section between Carbon and Highway 21, along with a portion of present-day Highway 836, was originally designated as part of Highway 26; while the section between Highway 21 and Acme, along with present-day Highway 806, was the original alignment of Highway 21.In 1958, the southern portion of Highway 21 was realigned to Highway 1 (Trans-Canada Highway) east of Strathmore, and the former section was renumbered as Highway 21A; however, in 1962, the route was again renumbered to Highway 26.Highway 26 was decommissioned in 1970 and in 1972, it was renumbered to its current designation.