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Functional Classification

Montana follows the Functional Classification (FC) system for both state and non-state roads. This change from the previous road-typing guidance was changed in September 2014.

State-wide

To properly type a Freeway, Major Highway, Minor Highway, or Primary Street, refer to the Montana Arcgis site and cross reference that against the Waze Functional Classification table.

Montana Department of Transportation homepage
Montana Department of Transportation Interactive Maps
List of Montana Numbered Highways
The Montana Road Log provides descriptions of Montana highways (useful to find start and end points when road signs are limited, or GIS resources aren't clear). From the MDT Brochures page
FC Statewide Map .pdf

MDT City, County, Urban, and Unincorporated Maps

MDT Incorporated City Maps

City Plat maps show public roads on a land grid of township, range and section lines. These maps do not imply roadway ownership or maintenance responsibility. Cultural features adjacent to roads are displayed by symbols. The maps also indicate managed areas by owner, lakes, reservoirs, streams, canals/ditches, and, railroads.

City system route maps are updated annually to show current On System Routes and the City Boundary. On System Routes are comprised of the Interstate NHS, Non-Interstate NHS, State Primary, and State Secondary routes.

MDT County Maps

County maps show roads on a land grid of township,range and section lines. MDT departmental route id's are indicated with a beginning label and ending label, and MDT corridor id's are added to some routes where possible. These maps do not imply roadway ownership or maintenance responsibility. Cultural features adjacent to roads are displayed by symbols. The maps also indicate managed areas by owner, lakes, reservoirs, streams, canals/ditches, and, railroads.

City areas are blocked out on these maps but they are available in the Urban maps, City Systems maps and Unincorporated Town Maps.

County system route maps are updated annually to show current On System Routes. On System Routes are comprised of the Interstate NHS, Non-Interstate NHS, State Primary, and State Secondary routes

MDT Urban Maps

Highway Systems include:

the National Highway System (NHS) - includes the Interstate and other principal arterials
the Primary Highway System
the Secondary Highway System
the Primary Streets

The six functional classifications for urbanized and urban areas include:

Interstate
Principal Arterials
Minor Arterials
Major Collectors
Minor Collectors
Local streets

MDT Unincorporated Town Maps

Unincorporated town maps show public roads on a land grid of township, range and section lines. These maps do not imply roadway ownership or maintenance responsibility. Cultural features adjacent to roads are displayed by symbols. The maps also indicate managed areas by owner, lakes, reservoirs, streams, canals/ditches, and, railroads

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