HMMH conducted noise barrier final design studies for Type II (retrofit) noise barriers in two locations along the Brooklyn-Queens Expressway (BQE) in Queens. The study areas involved extremely complex acoustical environments including aircraft overflights from nearby LaGuardia Airport, trains on elevated structure, both depressed and elevated expressway mainline combined with frontage roads, and reflections from retaining walls and existing noise barriers.
HMMH conducted field measurements to assist in validating noise modeling and performed noise barrier analysis using the FHWA’s TNM 2.5 noise model. The analysis determined that, for one project area, it was not possible to design a noise barrier to meet NYSDOT’s acoustical requirements without substantial reconstruction of the existing BQE structure. For the second project area, a noise barrier was designed to benefit 30 residences in townhouses adjacent to the expressway.
This is a world class noise specialty firm. We believe they were the only firm currently working for NYSDOT that were capable of performing this extremely complex and unique noise barrier study. —New York State Department of Transportation (NYSDOT) Project Manager