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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.

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 Also

Page Last Updated: March 11, 2014