The Challenge
The New York State Department of Transportation (NYSDOT) needed a noise mitigation analysis for 17 barrier areas located along the Long Island Expressway (LIE) in Nassau and Suffolk Counties.
The Strategy
HMMH performed preliminary and final-design noise mitigation analysis using the FHWA Traffic Noise Model (TNM). During the preliminary analysis, each barrier area was examined for its eligibility for further evaluation based upon projected noise impacts and the potential for acoustically feasible and economically reasonable noise mitigation.
Those areas meeting the requirements were carried forward into detailed final-design analysis, which included refining the location, height and endpoints of eligible noise barriers. Fourteen of the 17 barrier areas were found to be acoustically and economically reasonable. In addition, NYSDOT selected several barrier areas for analysis using both STAMINA2.0/OPTIMA and TNM.
The Solution
Those areas meeting the requirements were carried forward into detailed final-design analysis, which included refining the location, height and endpoints of eligible noise barriers. Fourteen of the 17 barrier areas were found to be acoustically feasible and economically reasonable.
In addition, NYSDOT selected several barrier areas for analysis using both STAMINA2.0/OPTIMA and TNM. HMMH conducted side-by-side analysis for these barrier areas using the two different models and summarized the results.
To learn more about this project, read Douglas E. Barrett's presentation from Internoise, 2001.
