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Recommended Best Practices for the Use of the FHWA Traffic Noise Model (TNM)

Appendix F. FDOT's Checklist for TNM Objects

 FDOT Checklist. Text version follows for screen readers only.

Figure F-1. Florida DOT's TNM Input File QC Checklist. Illustration.

The illustration is a reproduction of the TNM Input File Quality Control (QC) Checklist developed by the Florida Department of Transportation (FDOT). The checklist consists of three sections. In the first section, the reviewer provides information about the project, including the project name and limits, the county, a project identification number, the FDOT District, and the analyst/organization that created the TNM input file. The second section contains three checkboxes that indicate whether the TNM input file for which the review was performed is for Existing conditions, Design Year No-Build conditions, or Design Year Build Conditions. The third section includes a space for the reviewer to enter the name of the TNM input file. The third section also contains 16 checkboxes to be completed during the review of the TNM input file, including:

  • Run identification correct
  • Units in file - English or metric
  • Pavement type - average & default ground type - lawn
  • Traffic volumes & posted speeds match Noise Study Report & Approved Traffic Volumes
  • Roadway and ground zones named correctly
  • Receiver heights (5 ft), Criteria (66 dBA), and Substantial Increase (15 dBA)
  • All noise sensitive areas/sites represented
  • Tree zone heights and locations correct
  • Building row heights and locations correct
  • Terrain line heights and limits correct
  • Ground zone designations and limits correct
  • Roadway width, elevations, and directions correct
  • Ground elevations at proposed barrier locations and receivers correct
  • Input file includes all appropriate roadways, ground zones, existing barriers/berms, tree zones, bridges, and building rows
  • Cross section data along roadway verified using skew view in TNM
  • TNM print outs checked for missing data and data consistent within each category

The checklist also includes a place for the name of the reviewer of the TNM file and the date that the review was performed.

Figure F-1. Florida DOT's TNM Input File QC Checklist

Source: Florida Department of Transportation, “Traffic Noise Modeling and Analysis Practitioners Handbook: Appendix C,” Environmental Management Office, May 5, 2015. Available at: http://www.dot.state.fl.us/emo/pubs/Traffic%20Noise%20Modeling%20and%20Analysis%20Practitioners%20Handbook.pdf

Updated: 5/17/2017
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