MODELING INFRASTRUCTURE PERFORMANCE AND USER COSTS

An infrastructure performance model predicts the performance of the infrastructure system like bridges, railroad, buildings and highways, as a function of explanatory variables like infrastructure characteristics, ambient climate, usage of the system, etc. However, there is no unambiguous approach to directly measure the performance of the system. Therefore, following the ideas developed by Ramaswamy (1989), we consider performance to be unobservable (latent). The problem of developing performance deterioration models includes the definition of the above unobservable performance in terms of the observed or measurable distress measures of the system, and simultaneously relating the performance to the explanatory variables. In this thesis using the methodology developed by Ramaswamy (1989), we explore the existence of a two-dimensional performance measure for highway pavements - a latent variable to represent functional performance and another variable to represent structural integrity or structural performance of the pavement. The methodology is also extended to include user costs (costs accruing to the users of the infrastructure system) in the modeling framework. Hence, an integrated performance and user cost model system is developed, and a case study conducted on a highway example with data obtained from the World Bank. The methodology is a statistically rigorous technique that avoids judgemental measures. The performance is characterized by continuous latent variables. Although the case study is on highways, the methodology is general and applicable to any deteriorating system with measurable distress measures and explanatory variables. Further, a framework for estimating deterioration models with the performance characterized by discrete latent states is presented.

  • Corporate Authors:

    Massachusetts Institute of Technology

    Center for Construction Research and Education, 77 Massachusetts Avenue
    Cambridge, MA  United States  02139
  • Authors:
    • Gopinath, D A
  • Publication Date: 1992-2

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 130 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00629167
  • Record Type: Publication
  • Report/Paper Numbers: PACT Rept No. 92-6, CCRE 92-8
  • Contract Numbers: DAAL03-87-K-0005
  • Files: TRIS
  • Created Date: May 27 1993 12:00AM