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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


GIS Resources


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.

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.

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


Forest Service Roads

When editing Forest Service Roads be sure to read the Waze wiki page first in order to follow naming convention. Listed below are references that are a good starting point


Motor Vehicle Use Map (MVUM)