Illinois Department of Transportation, Ann L. Schneider, Secretary
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Patrick J. Quinn, Governor
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Part I Noise Fundamentals

Part II Noise Analysis

Part III Noise Abatement

Frequently Asked Questions

Glossary and Acronyms


Barrier Length  

A barrier needs to block the view of the receptor to the vehicles using the road. Generally, a barrier should extend 4 times the distance between the end receptor and barrier to be effective.

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