Noise requirements
2026 noise requirements
- 2026 noise requirements (PDF)
- 2026 noise requirements update summary (Word)
- 2026 noise requirements implementation plan (PDF)
2026 guidance
- 2026 Brochure/solicitation template (PDF)
- Brochure/solicitation example (PDF)
- Frequently asked questions (PDF)
- Community Noise Engagement Process 1252025 (PDF)
- FOF Sample (PDF)
- Guidance for addressing noise for construction traffic mitigation measures (PDF)
- Interior noise workbook actual window sizes (Excel)
- Interior noise workbook percentage (Excel)
- Loudest noise hour (PDF)
- Noise glossary (PDF)
- Noise impact analysis guidance for section 4(f) (PDF)
- How 23 CFR 772 and 774 work together (PDF)
- Analyzing noise impacts for section 4(f) where quiet is important (PDF)
- Noise report guidance checklist (PDF)
- Stationary source modeling example (PDF)
- Traffic noise flowcharts:
- Interior noise analysis flowchart for Category D facilities (PDF)
- Flowchart for draft EIS (PDF)
- Flowchart for EA-EAW (PDF)
- Flowchart for federal Cat-Ex projects (PDF)
- Flowchart for combined FEIS/ROD process (PDF)
- Flowchart for existing noise barriers - 2025 (PDF)
- Voting examples for multi-unit buildings:
- Multi-unit building with benefited common area and no unit-specific area of frequent human use (PDF)
- Multi-unit building with common area not exceeding NAC and some unit specific areas of frequent human use (PDF)
- Multi-unit building with common area and some unit-specific areas of frequent human use (PDF)