Field Evaluation of Reflected Noise from a Single Noise Barrier (2018) / Chapter Skim
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D-3 C H A P T E R D - 1 Intended Use The accompanying Barrier Reflections Screening Tool quickly estimates the expected increase in traffic noise due to reflections from a barrier on the opposite side of the road. This tool focuses on a single variable to estimate the barrier-reflected noise effect at receptors opposite a noise barrier: path-length difference (comparing the path length for direct sound and for barrier-reflected sound)
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D-4 C H A P T E R D - 2 Instructions for Use Two versions of the tool (separated by tabs in the spreadsheet file) are provided, and they accept different input types.
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D-5 C H A P T E R D - 3 Validation of Estimates For NCHRP Project 25-44 Phase 1, the project team conducted field measurements in California (SR-71) , Maryland (MD-5)
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D-6 the barrier effect for absorptive barriers (sites I-75, I-70, and I-270) , but since the absorptive barrier sites all had geometries with fairly large propagation distances for the reflected path, that expectation is not realized.
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Content Available Online The following files are available online for viewing or download. To access these files, go to www.trb.org and search for "NCHRP Research Report 886".
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Abbreviations and acronyms used without definitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACI–NA Airports Council International–North America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FAST Fixing America's Surface Transportation Act (2015) FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012)
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TRA N SPO RTATIO N RESEA RCH BO A RD 500 Fifth Street, N W W ashington, D C 20001 A D D RESS SERV ICE REQ U ESTED ISBN 978-0-309-39067-5 9 7 8 0 3 0 9 3 9 0 6 7 5 9 0 0 0 0 Field Evaluation of Reflected N oise from a Single N oise Barrier N CH RP Research Report 886 TRB
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