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:

1. Identify Existing Activities
2. Measure Existing Noise Levels
3. Predict Future Noise Levels
4. Identify Potential Impacts
5. Evaulate Appropriate Abatement Measures

• DDOT Highway Noise Policy § 6.2

See Related

• Page:
  Highway Noise (Compendium)
• Page:
  Highway Access and Noise (Compendium)