A Review of Distress and Roughness Performance Models in Nova Scotia's Pavement Management System

Nova Scotia Transportation and Infrastructure Renewal (NSTIR) implemented its pavement management system (Highway Pavement Management Application or HPMA) in 2008. NSTIR conducts annual pavement condition surveys on their highway network. Data collected includes International Roughness Index (IRI), which is used to calculate a Roughness Index (RI). Surface distress data is also collected to calculate a Distress Index (DI). The RI and DI are combined into an overall Pavement Quality Index (PQI). In 2016, NSTIR initiated a project to review their pavement prediction models. Differences in historical data trends were noted during the initial model review. These differences were thought to be a result of technological advancements in data collection equipment. The study examined the existing roughness and distress indices to determine if and/or how changes in data collection technology have impacted the measured pavement condition. The investigation included a review of the historical roughness and distress data. Based on this data review, changes were made to the roughness and distress models to better reflect current NSTIR data and conditions. A feedback analysis was then conducted on the prediction models to conduct performance modeling on the HPMA. This paper details the data investigation and updated models.


  • English

Media Info

  • Media Type: Print
  • Pagination: pp. 167-185.
  • Monograph Title: Proceedings of the Sixth-Second Annual Conference of the Canadian Technical Asphalt Association (CTAA): Halifax, Nova Scotia

Subject/Index Terms

Filing Info

  • Accession Number: 01668506
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • Files: ITRD, TAC
  • Created Date: May 3 2018 3:18PM