This collection is a sub-subgroup under the Montana Department of Transportations records, RS 492. The Planning and Research Bureau formerly operated under the DOT Engineering Division. The Bureau is now defunct. To see the other Department of Transportation records, visit the primary finding aid, RS 492.

These records consist of general correspondence (1937-1984) arranged by subject; financial records (1936-1970); organizational records (1969-1971, n.d.); reports (1963-1973); subject files (1937-1979); and miscellany (1918-1976). (Maps, photographs, and printed material have been transferred to the Library Map Collection, Photograph Archives, and Library respectively.)