This collection is a sub-subgroup under the Montana Department of Transportations records, RS 492. The Missoula District Office operates under the DOT Director's Office Division. To see the other Department of Transportation records, visit the primary finding aid, RS 492.

This collection consists primarily of correspondence documenting district office activities, including: notifications of, and judgments on, encroachment of highway right of way; training needs and requirements for personnel; departmental policies and procedures; signing on Montana highways; plowing, sanding, speed limits, crossing lights/walks, and other pedestrian and driver safety measures; testing roadway durability; and scheduling roadway projects, such as resurfacing and widening.

It should be noted that the Archives is only in possession of the Department of Highway, Missoula District Office records, and did not receive any accompanying Missoula District Office records from the Department of Transportation.