Regulations, Guidelines & Policies

CDOT Noise Analysis & Abatement Guidelines

CDOT’s Noise Analysis and Abatement Guidelines was most recently published on October 9, 2020. As a result, the CDOT Traffic Noise Technical Report Template and associated Form 1209 were also updated. 

• 2020 Noise Analysis and Abatement Guidelines

CDOT's Traffic Noise Technical Report Template

• September 2020, Version 2 - for projects using 2020 NAAG

Form 1209: Noise Abatement Evaluation Worksheet

• September 2020 Version - for projects using 2020 NAAG
  

Other Resources

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