MDT’s mission is to plan, build, operate, and maintain a safe and resilient transportation system to move Montana forward.

The Department of Transportation is the agency responsible for administering the multimodal transportation network in Montana.  The department plans, designs, builds, and maintains the statewide network of highways and bridges. The department also provides for the other aspects of a statewide multimodal transportation system through:

• Aviation airport planning, safety, promotion, and maintenance facilitation
• Rail infrastructure coordination, monitoring, and planning
• Highway traffic safety promotion, planning, and administration
• Vehicle weight and dimension permitting and law enforcement
• Transit assistance

The Governor-appointed five-member transportation commission establishes department priorities and apportions funding among the five state financial districts according to statutory guidelines, department recommendations, and community input.  The Governor-appointed nine-member Board of Aeronautics establishes priorities for department aeronautics grant activities.