National Cooperative Highway Research Program (NCHRP); Special Studies, Reviews, Conferences, and Special Projects

The purpose of this task order is to provide research on the topic of Field Evaluation of Reflected Noise from a Single Noise Barrier. The research objectives are as follows: (1) determine the noise level magnitude, and in particular, the fractional octave-band frequency spectrum of the overall noise in the presence of a single reflective noise barrier for positions on the opposite side of the highway; (2) compare through use of equivalent site analysis and/or simultaneous measurements, the difference in overall noise level and frequency distribution (3) compare cases with both reflective barriers and to include data based on standard highway noise metrics that would contribute to an overall understanding of the perception of this reflected sound; (4) use the quantitative analyses to determine if the degree/magnitude and /or composition of the noise level actually changes; (5) help state departments of transportation (DOTs) gain a better understanding of when it may be necessary to use absorptive surfaces on noise barriers or other structures such as retaining walls; and (6) produce insight and data to help serve as a validation tool and be incorporated into future version of the Federal Highway Administration (FHWA) Traffic Noise Model to enhance implementation of reflection calculation algorithms in the program.

• Supplemental Notes:
  • No final report issued

Language

• English

Project

• Status: Active
• Funding: $50000
• Sponsor Organizations:

  Federal Highway Administration

  Office of Planning, Environment and Realty (HEP)
  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Project Managers:

  Landolt, Jean

• Performing Organizations:

  National Academy of Sciences

  500 5th Street, N.W.
  Washington, DC    20001
• Start Date: 20160420
• Expected Completion Date: 20180419
• Actual Completion Date: 20180419

Subject/Index Terms

• TRT Terms: Algorithms; Noise barriers; Reflection; Sound absorption; Sound barrier; State departments of transportation; Traffic noise
• Identifier Terms: Traffic Noise Model
• Subject Areas: Environment; Highways;

Filing Info

• Accession Number: 01604611
• Record Type: Research project
• Source Agency: Federal Highway Administration
• Files: RIP, USDOT
• Created Date: Jul 6 2016 1:34PM