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Traffic Noise Model 3.2 Addendum to the TNM 3.0 Validation Report
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2024-04-01
[PDF-806.29 KB]
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Edition:Final Report
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Abstract:The Federal Highway Administration's Traffic Noise Model (TNM) version 3.2 was released in January 2024. The software updates in this version of TNM were focused on integrating the capabilities of the Roadway Construction Noise Model version 2.0 into the TNM 3.1 architecture. Additional bug fixes and model improvements were also included. This memo supplements the TNM 3.0 Validation Report to confirm that results produced by the latest version of the Traffic Noise Model have not significantly changed from those produced by previous versions of the TNM 3 Series. No changes to the TNM acoustic algorithms were made between versions 3.0 and 3.1 such that TNM 3.1 results are equivalent to those produced by TNM 3.0. TNM results were computed using both versions 3.1 and 3.2 for all project files in the Validation Testing and Diagnostic Testing datasets. The FHWA Automated Consistency Test Suite (ACTS) was used to evaluate project geometry and computed receiver noise levels between the two versions.
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