HMMH developed Version 1.0 of the Federal Highway Administration's Traffic Noise Model (FHWA-TNM), in the mid 1990's. As part of the development, HMMH designed TNM's:
- User interaction
- Detailed functions
- Input methods
- Output
- Emission-level analysis
In addition, HMMH designed, wrote, and tested all acoustical algorithms and code. HMMH also wrote TNM's Technical Manual and drafted its User's Guide.
