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Traffic Noise Model

FHWA TNM Forum/Technical Support

The FHWA TNM forum and Technical Support provides online answers to your technical questions about FHWA's Traffic Noise Model. Please select an option below to search for information on a specific issue. It is recommended that users browse through the Frequently Asked Questions (FAQ) before proceeding to contact the FHWA TNM Tech Support.


Re:NEPA is a forum that "supports and encourages the open exchange of knowledge, information, experience, and ideas". Please use this forum (Re:NEPA.) to post questions, share your knowledge and learned about the FHWA TNM.

Email Tech Support

If you cannot find answers to your FHWA TNM questions from the FAQs, you can contact the FHWA TNM Tech Support team at To expedite the process, please include your FHWA TNM registration number in the email.

The technical support is funded by a portion of the sales of the FHWA TNM, where there was a cost associated with Version 1.0 (included free upgrades to 1.0a, 1.0b, and 1.1) and Version 2.0 (included free upgrades to 2.1 and 2.5). Information acquired during FHWA TNM technical support phone calls and e-mails contributed to past GUI enhancements and bug fixes for the model and are currently being used to chart future FHWA TNM development.

Updated: 9/23/2014
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