HMMH has a nationwide reputation for technical excellence in highway noise and vibration control. Our clients include engineering firms, state departments of transportation, the Federal Highway Administration (FHWA), private land developers, and homeowners. Our innovative solutions include the development of the FHWA’s highway noise prediction computer program, the Traffic Noise Model (TNM).

HMMH also solves construction noise and vibration problems and specializes in mobile source air quality impacts. 

quote HMMH's understanding of state and federal requirements along with their responsiveness to project needs make HMMH the gold standard in their field. quote —Ed Hollingshead, Fay, Spofford & Thorndike, Inc