Highway Noise


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

  File Modified

PDF File Highway Noise Policy.pdf

26 Mar, 2022 by James Graham