Profiler Certification Process at the Virginia Smart Road

Road roughness is considered to be one of the most important indicators of the performance of the pavements and is also a major determinant of road user costs. Most longitudinal road profile measurements are summarized using the International Roughness Index (IRI) which was developed by the National Cooperative Highway Research Program (NCHRP) and the World Bank. A laser-based inertial profiler is this most common instrument used to measure longitudinal profiles at highway speeds. These profiles are then used to compute the IRI at project and network levels. The primary objective of this paper is to present the process followed to develop a certification site for verification of inertial profilers on the Virginia Smart Road. This exercise also served to increase the understanding of how varying sampling rates, processing methods, and other factors contribute to the different results obtained by different inertial profilers. Based on the general requirements set forth by the specifications, five test sections were chosen. Profiles from eight different inertial profilers were then compared to reference measurements made with an ICC SURPRO device. Good agreement was found between the reference device and each of the participant profilers IRI for all the test sections. Errors in the distance as recorded by the profilers’ distance measurement equipment resulted in low cross-correlations for reproducibility with the reference profiler.


  • English

Media Info

  • Media Type: DVD
  • Features: Figures; Photos; References; Tables;
  • Pagination: 13p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01152338
  • Record Type: Publication
  • Report/Paper Numbers: 10-2513
  • Files: TRIS, TRB
  • Created Date: Jan 25 2010 11:11AM