Illinois Department of Transportation, Erica Borggren, Acting Secretary
Patrick J. Quinn, Governor
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The Bureau of Design and Environment shall publish and maintain a Highway Traffic Noise Assessment Manual which shall be used as a basis for preparing noise analyses required for Environmental Impact Statements and other environmental documents and studies for projects on the State Highway System.

This policy is issued in order to ensure that studies and reports on traffic noise prepared by or for the Department are consistent with existing laws and regulations and are technically accurate and sufficient.

The Manual:

  1. Describes techniques and procedures for analyzing and reporting traffic noise impacts;
  2. Describes various barriers and other measures which can be incorporated in project designs to mitigate traffic noise impacts; and
  3. Notes references and examples to aid in the study of traffic noise and includes guidelines for the presentation of study results in environmental documents.

View a copy of the Highway Traffic Noise Assessment Manual

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