Pavement Thickness Design for Local Roads in Iowa

Three pavement design software packages were compared with regards to how they were different in determining design input parameters and their influences on the pavement thickness. StreetPave designs the concrete pavement thickness based on the Portland Cement Association (PCA) method and the equivalent asphalt pavement thickness. The WinPAS software performs both concrete and asphalt pavements following the American Association of State Highway and Transportation Officials (AASHTO) 1993 design method. The Asphalt Paving Association of Iowa (APAI) software designs asphalt pavements based on pre-mechanistic/empirical AASHTO methodology. First, the following four critical design input parameters were identified: traffic, subgrade strength, reliability, and design life. The sensitivity analysis of these four design input parameters was performed using three pavement design software packages to identify which input parameters require the most attention during pavement design. Based on the current pavement design procedures and sensitivity analysis results, a prototype pavement design and sensitivity analysis (PD&SA) software package was developed to retrieve the pavement thickness design value for a given condition and allow a user to perform a pavement design sensitivity analysis. The prototype PD&SA software is a computer program that stores pavement design results in a database that is designed for the user to input design data from the variety of design programs and query design results for given conditions. The prototype PD&SA software package was developed to demonstrate the concept of retrieving the pavement design results from the database for a design sensitivity analysis. This final report does not include the prototype software which will be validated and tested during the next phase.

  • Record URL:
  • Corporate Authors:

    University of Iowa, Iowa City

    Public Policy Center
    227 South Quadrangle
    Iowa City, IA  United States  52242-1192

    Iowa Department of Transportation

    800 Lincoln Way
    Ames, IA  United States  50010
  • Authors:
    • Lee, Hosin David
    • Kim, Yongjoo Thomas
    • Purvis, Jeremy
  • Publication Date: 2010-2


  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 156p

Subject/Index Terms

Filing Info

  • Accession Number: 01154200
  • Record Type: Publication
  • Report/Paper Numbers: IHRB Report TR-586
  • Created Date: Apr 8 2010 9:53AM