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Federal Highway Administration's Traffic Noise Model (FHWA TNM®), User's Guide (Version 2.0 Addendum)

3. Certified Output for the Official TNM Test Case

This section contains the certified output computed for the official TNM test case using Version 2.0. Since TNM Version 1.0, updates to the model have resulted in an average 0.1 0.2 dB difference at receivers for some geometries due to an adjustment to one of TNM's computation variables. Appendix E in the TNM 1.0 User's Guide displays the sound level results computed using TNM Version 1.0 for the official TNM test case. The sound level results computed using the current version are shown in Figure 24 below.

This sound level results table for the TNM test case (provided with the model) shows receiver name, sound levels, type of impact, and noise reduction.
Figure 24. Updated Sound Level Results table for the official TNM test case

Updated: 8/24/2017
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