Noise Wall Overhang Design [Factsheet]

Details

• Creators:
  Sperry, Benjamin R. ; Staley, Blake ; Khoury, Issam ; Cubick, Karel L. ; Ruggles, Bill ; Hren, Jonathan
• Corporate Creators:
  Ohio University. Ohio Research Institute for Transportation and the Environment (ORITE) ; ms consultants, inc
• Corporate Contributors:
  Ohio Department of Transportation ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Acoustic properties
  • Air quality
  • Cost effectiveness
  • Design
  • Highways
  • Literature reviews
  • Noise barriers
  • Walls
• Publication/ Report Number:
  FHWA/OH-2019-18
• Resource Type:
  Brief
• Geographical Coverage:
  United States;Ohio
• Corporate Publisher:
  Ohio Research Institute for Transportation and the Environment
• Description:
  One potential option to achieve noise reduction at a lower cost is to add a roadway-side overhang component to the top of an existing or proposed noise wall. Broadly, a noise wall “overhang” modification is an additional structural element or fixture attached along the top edge of a traditional or “plain-top” noise wall. The acoustical benefit of an overhang is that the distance traveled between the traffic noise source and a listener behind the wall is increased relative to a traditional plain top wall. Most applications of noise wall overhang designs are characterized by the shape that is assumed by the wall’s cross-section after the modification is deployed. For example, an overhang design in which the overhang is at a 90° angle with respect to the vertical wall face is known as a “T-Top” noise barrier while any overhang with an angle between 0° and 90° is termed a “Y-Top” noise barrier.
• Format:
  PDF
• Funding:
  SJN 135774
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/66168/dot_66168_DS1.pdf
• File Type:
  [PDF - 312.96 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:090118ee0f934e59088de7e4a7adcf8723d5e8945c0b1f0e1c50ecca1a6e9edbe03210a0cc7e068318f211a0bb1bec8a104dea70d3c16b8a34338ecab8f1c3c8