Implementation of an International Roughness Index for Mn/DOT Pavement Construction and Rehabilitation

This report documents the development and preparation for implementation of a specification for using International Roughness Index (IRI), using an inertial profiler, as a smoothness measure for new portland cement concrete pavements in Minnesota. This new specification represents a departure from the use of the Profile Index, using a California Profilometer, for concrete pavement smoothness. In addition to providing recommendations to the Minnesota Department of Transportation regarding the implementation of the specification, the report contains additional information and analyses. These include a summary of the specifications in use by other states for measurement and incentive/disincentive payment for concrete pavement smoothness, an analysis of the effects of pavement surface characteristics on the IRI and the Profile Index, and a comparison of IRI-based concrete pavement smoothness specifications in use by other states. The report concludes with several recommendations for the new specification and for its administration and enforcement by the Minnesota Department of Transportation.

  • Record URL:
  • Summary URL:
  • Corporate Authors:

    Minnesota State University, Mankato

    Department of Mechanical and Civil Engineering, 205 Trafton Science Center East
    Mankato, MN  United States  56001

    Minnesota Department of Transportation

    Research Services Section, 395 John Ireland Boulevard, Mail Stop 330
    St Paul, MN  United States  55155
  • Authors:
    • Wilde, W James
  • Publication Date: 2007-4


  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 133p

Subject/Index Terms

Filing Info

  • Accession Number: 01052343
  • Record Type: Publication
  • Report/Paper Numbers: MN/RC-2007-09
  • Contract Numbers: 88924
  • Created Date: Jul 6 2007 12:44PM