What we do
We assess existing and future noise levels and their impacts on major projects.
Noise analysis
MnDOT always considers traffic noise on environmental studies that involve major highway improvements. For these projects, a noise study is required to assess existing noise levels and predict future noise levels to determine noise impacts.
Noise abatement studies
- Priority list (PDF) - updated 2011
- Study text (PDF)
- Hwy 47 reflective study (PDF)
- Hwy 100 reflective study (PDF)
Policy
Resources
- FAQs
- FHWA noise table
- Finding of fact example (PDF)
- Glossary
- Loudest hour example (PDF)
- Noise barrier before and after photos
- Noise brochure (PDF)
- Noise models
- Noise wall material selection process
- Noise wall types
- Related links
- Resident envelope example (PDF)
- Solicitation letter example (PDF)
- Tech memos
- Traffic noise flowcharts for environmental documents
- Vehicle classes for noise modeling (PDF)
- Voting examples for multi-unit buildings