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.
CDOT's 2020 Noise Analysis and Abatement Guidelines
CDOT's Traffic Noise Technical Report Template
Form 1209: Noise Abatement Evaluation Worksheet
Other Resources
- Federal Noise Regulation 23 CFR 772
- CDOT Roadway Design Guide, Chapter 16 - 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
CDOT Guidelines for In-Kind Noise Wall Replacement Projects
CDOT introduced new guidance for in-kind noise wall replacement projects on May 22, 2025. It includes step-by-step instructions and three memorandum templates. It applies to CDOT projects conceived to replace an old or failing noise wall with an in-kind, new noise wall so that the original noise reductions will effectively be maintained in perpetuity.
CDOT's 2025 In-Kind Noise Wall Replacement Guidelines and Memorandum Templates:
