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FHWA Traffic Noise Model Version 3.0


Development on TNM 3.0 acoustical algorithms began in 2008 in cooperation with the Volpe Center. In 2013, the FHWA issued a BAA for completion of the TNM 3.0, particularly the Graphical User Interface (GUI) and Interoperability portions. Gannet Fleming won the award and has been working with the FHWA and Volpe Center to complete the TNM 3.0. In late 2015 the TNM 3.0 software underwent Beta Testing by selected State DOTs. Currently the development is addressing those comments in addition to optimizing the model to reduce run times.


TNM 3.0 features a new map-based GUI for data entry and analysis, new acoustical algorithms (including the ability to process reflections off of single barriers, as well as L10/L50 capabilities), and interoperability via a TNM plug-in to Esri’s ArcGIS®, AutoDesk’s AutoCAD®, and Bentley’s MicroStation®. These enhancements are expected to provide users with more flexibility and accuracy during the data entry process, and better visual representations during the data analysis phase of highway traffic noise studies.


A draft release for public download and use is anticipated early in 2017. As part of this release the FHWA will be opening up a Questions and Comments Online Portal. For more information see our Portal and Release FAQs.

As part of this website’s development the FHWA has undertaken an Information Collection Review (ICR) with associated Federal Register (FR) Notices. The As part of these FR Notices, the FHWA is seeking comment on the Information Collection. For more information please see our OMB ICR FAQs.

This website will be updated periodically as more information about the TNM 3.0 release becomes available. Check back for updates on webinars and schedules.

If you have any questions please contact Aileen Varela-Margolles at

Updated: 12/30/2016
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