Profiler Performance Evaluation and Accuracy Criteria Analysis

There is an urgent need for accurate measurement of pavement smoothness. A recent profiler round-up compared the performance of 68 profilers on five test sections at the Virginia Smart Road. This investigation used a sample of the data collected during the experiment to compare the profiles and International Roughness Index (IRI) measured for each type of equipment with each other and with the reference. These comparisons allowed determination of the accuracy and repeatability capabilities of the existing equipment, evaluation of the appropriateness of various profiler accuracy criteria, and recommendations of usage criteria for different applications. The main conclusion of this investigation is that there are profilers available that can produce the level of accuracy (repeatability and bias) required for construction quality control and assurance. However, the accuracy degrades when the IRI of rough HMA pavement with coarse texture is measured and compared with the rod-and-level measurement. The cross-correlation method appears to have some advantages with respect to the conventional elevation tolerance method for comparing the measured profiles. On the sites investigated, good cross-correlation among the measured and reference profiles assured acceptable IRI repeatability and accuracy. As expected, the analysis based on power spectral density and gain method showed that the profiler gain errors are non-uniformly distributed and that errors at the range of 0.02–0.08 cycle/m and 0.3–1 cycle/m have more significant effect on the IRI bias.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; Photos; References; Tables;
  • Pagination: 19p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01043873
  • Record Type: Publication
  • Report/Paper Numbers: 07-2759
  • Files: TRIS, TRB
  • Created Date: Feb 8 2007 7:27PM