Montana Department of Transportation

Contracting & Consulting

Environmental: What's all that Noise?

The Environmental Hazardous Waste section conducts noise analyses for all highway projects which involve significant changes in alignment, addition of travel lanes, or new roads on new alignments.


Air Quality

The Hazardous Waste Section is responsible for determining project level air quality conformity of transportation projects for the NEPA process. For a list of Montana's PM-10, PM2.5 and CO non-attainment areas, along with a listing of local monitoring stations, refer to the Montana Department of Environmental Quality's website (Planning & Compliance Division) for more information on air quality.

For questions about traffic noise or comments on the policy, please contact:

  • 406.444.7659