Are TNM contours allowed for impact determination or abatement consideration?
FHWA does not recommend using contours to determine impacts or for abatement consideration. Contours should only be used for planning purposes, specifically when following 772.15(a), which states: The best estimation of future noise levels (for various distances from the highway improvement) for both developed and undeveloped lands or properties in the immediate vicinity of the project.
Related Questions
- Are indirect and cumulative impact consideration, analysis, and documentation requirements the same for categorical exclusions, environmental assessments, and environmental impact statements?
- Are TNM contours allowed for impact determination or abatement consideration?
- Are contours allowed to intersect other TNM objects?
