Evaluate methodology to determine localized roughness.

Details

• Creators:
  Fernando, Emmanuel G. ; Walker, Roger S.
• Corporate Creators:
  Texas A&M Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Passenger comfort
  • Roughness
  • Pavement performance
  • Smoothness
  • Surface course irregularities
  • Quality assurance
  • Ride Quality Measurement
  • Ride Specification
  • Localized Roughness
  • Bump Rating Panel Surveys
• Publication/ Report Number:
  FHWA/TX-14/0-6610-2
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Corporate Publisher:
  Texas A&M Transportation Institute
• Abstract:
  The Texas Department of Transportation implements a smoothness specification based on inertial profile ; measurements. This specification includes a localized roughness provision to locate defects on the final ; surface based on measured surface profiles. To identify defects, the existing methodology uses the ; deviations between the average of the left and right wheel path profiles, and its moving average as ; determined using a 25-ft base length. Stations where the deviations exceed 150 mils in magnitude are ; considered defect locations. While this methodology provides an objective approach for evaluating localized ; roughness based on profile data, some districts have introduced an additional step to determine the need for ; corrective work. Specifically, these districts have used a bump rating panel to select, from among the ; defects identified using the existing procedure, those bumps and dips that will require correction based on ; the panel’s opinion of the severity of the defects from a ride quality point of view. Clearly, a standard ; methodology needs to be developed so that consistency in ride quality assurance testing can be maintained. ; Otherwise, differences in results of quality assurance tests between projects within a district and between ; districts can easily arise because of differences in road user perception of ride quality. Consequently, this ; project examined the existing methodology for evaluating localized roughness to develop recommendations ; for an improved methodology that engineers can use to objectively decide where corrective work is ; necessary so as to maintain consistency in quality assurance testing of pavement smoothness.
  More +
• Format:
  PDF
• Funding:
  Project 0-6610
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/30766/dot_30766_DS1.pdf
• File Type:
  [PDF - 2.12 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:57743ba061f7dc6037abf615ddb97c793d461e08686799029ef8937a768b4498