Noise Modeling and Measurement Content
Traffic Noise Model
The FHWA TNM, Version 2.5, is the current model version. To comply with 23 CFR, Part 772.17 the FHWA TNM, Version 2.5 (or any other model determined by the FHWA to be consistent with the methodology of the FHWA TNM) is required to be used on all Federal-aid highway projects. TNM2.5 can be installed from FHWA website.
Traffic Noise Measurements
Update: The ADOT Noise Team is currently updating process for conducting noise measurements in the field, when complete information will be provided, please refer to FHWA Measurement of Highway-Related Noise - Report PDF.