Noise Policy

ADOT Noise Abatement Policy / Addendum
This policy is based on currently accepted practices and procedures by federal and state transportation agencies to assess and mitigate highway-related noise levels. This policy became effective on December 5, 2005, and supersedes the previous Noise Abatement Policy dated March 31, 2000. An addendum to the noise policy was approved by the Federal Highway Administration on August 24, 2007.

 ADOT Noise Abatement Policy
 Addendum to the ADOT Noise Abatement Policy

Flowchart for Noise Process
This handy flowchart shows the steps involved when evaluating noise impacts for highway improvement projects.

 Flowchart for Noise Process

Facts about Noise
This handy flyer provides general rules of thumb about noise decibels levels and noise mitigation.

 Facts about Noise

Common Indoor and Outdoor Noise Levels
This handy chart illustrates the decibel levels of indoor noise sources, such as a vacuum cleaner, and outdoor noise sources, such as a diesel truck. The chart ranges from 0 to 140 decibels.

 Common Indoor and Outdoor Noise Levels

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