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Regulations, Guidelines, & Policies

CDOT Noise Analysis and Abatement Guidelines

CDOT’s Noise Analysis and Abatement Guidelines was most recently published on January 15, 2015. Section 4.0 of Appendix C was updated on November 3, 2015. The following documents make up the current CDOT Noise Analysis and Abatement Guidelines:

Federal Noise Regulation 23 CFR 772
CDOT Roadside Design Manual, Chapter 18 - Noise
FHWA's Highway Traffic Noise: Analysis and Abatement Guidance, December 2011
FHWA's Measurement of Highway-Related Noise, May 1996
Colorado Revised Statutes Title 25 Health Section 25-12-103, Maximum permissible noise levels
FHWA's highway traffic noise website


Colorado: The Official State Web Portal