The development of TNM 3.2 was based off of work done by the National Cooperative Highway Research Program (NCHRP) in 2018, in combination with a longstanding goal of integrating the FHWA models for traffic noise and construction noise. As such, TNM 3.2 supersedes both TNM 3.1 and RCNM 2.0.
TNM 3.2 now contains the necessary acoustics to compute both noise from normal use and operation of the roadway as well as noise from roadway construction activities and equipment. The roadway noise acoustics remain the same as in TNM 3.0 while the construction noise acoustics are based off of the results of the NCHRP 25-49 project. This version also allows filtering and sorting more data tables, improved the error message information, and fixed segmentation bugs.
Please contact TNMHelp@dot.gov for Technical Support. In the Subject Line please indicate whether you are seeking support for TNM 2.5 or TNM 3.2.
For announcements regarding available training opportunities please visit our main Training webpage.
| Title/Description | Date | Files |
|---|---|---|
| TNM 3.2 Release Memorandum | 2023 | |
| Traffic Noise Model 3.2 | 2023 | |
| TNM 3.2 Fact Sheet (FHWA-HEP-24-011) | 2023 | |
| TNM 3.1 to 3.2 Change Log (FHWA-HEP-24-017) | 2023 | |
| TNM 3.2 User's Guide/Help Menu (FHWA-HEP-24-014) | 2023 | |
| TNM 3.2 File Format Reference Manual (FHWA-HEP-24-016) | 2023 | |
| TNM 3.2 FAQs (FHWA-HEP-24-013) | 2023 | |
| TNM 3.2 Technical Manual (FHWA-HEP-24-015) | 2023 | |
| TNM 3.0 Validation Report (FHWA-HEP-20-011) Note: No changes were made to the Validation Report for TNM 3.2 |
2019 | |
| TNM 3.2 Validation Report Addendum (FHWA-HEP-24-033) | 2024 | |
| TNM 3.2 Getting Started Guide (FHWA-HEP-24-012) | 2023 |
