Highway Noise
Mission
In regards to all federal highway projects in the District of Columbia, DDOT should consider noise mitigation whenever a project-related highway traffic noise impact is expected to occur. A highway traffic noise impact is deemed to occur when predicted (design-year) noise levels either approach or exceed the applicable noise abatement criteria (NAC) or substantially increase the existing noise levels.
DDOT Noise Policy
Procedures & Services
DDOT shall follow the following steps for evaluating traffic-related noise impacts:
- Identify Existing Activities
- Measure Existing Noise Levels
- Predict Future Noise Levels
- Identify Potential Impacts
- Evaulate Appropriate Abatement Measures
- DDOT Highway Noise Policy § 6.2
See Related
-
Highway Noise (Compendium)
-
Highway Access (Compendium)
Additional Information
Legal References
- 23 CFR 772: Process for Abatement of Highway Noise and Construction Noise
- Noise Control Amendment Act of 1977
- DCMR 20-27: Noise Control
- DCMR 20-28: Maximum Noise Levels
- DCMR 20-29: Noise Measure Test Procedures
Design Standards & Specifications
- n/a
Transportation Plans & Studies
- n/a
Other Resources