Cotton Belt Corridor Regional Rail Project

HMMH was responsible for noise and vibration analysis throughout the environmental impact assessment phase of this commuter rail project. The Cotton Belt Corridor Regional Rail Project will follow the existing freight rail line from Dallas/Fort Worth Airport to the Richardson/Plano area of Texas (northeast). Significant noise impacts are expected from the loud horns that normally must be sounded as trains approach grade crossings; thus, the primary noise mitigation measure that has been recommended for this project is the establishment of Quiet Zones.

HMMH conducted ambient noise measurements as well as ground-borne vibration propagation measurements throughout the study area. The measured data were used to define the existing noise and vibration conditions. A noise and vibration impact assessment was conducted in accordance with the guidelines set forth by the U.S. Federal Transit Administration.
HMMH also conducted a noise and vibration test program for the Stadler diesel multiple unit (DMU) vehicles that are planned for the project and are currently operating on the Denton County Transportation Authority (DCTA) A-Train system.

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