Review of PCR methodology.
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Review of PCR methodology.

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  • English

  • Details:

    • Alternative Title:
      Review of pavement condition rating methodology
    • Corporate Creators:
    • Publication/ Report Number:
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    • Edition:
      Final report.
    • Corporate Publisher:
    • Abstract:
      This study was conducted to review the Pavement Condition Rating (PCR)

      methodology currently used by the Ohio DOT. The results of the literature search in this

      connection indicated that many Highway agencies use a similar methodology to rate their

      pavements. However, due to the linear nature of the current PCR model, it is deficient in

      certain respects.

      An analysis of the PCR data, which was collected by the ODOT in the past 11 years

      (1985-95), indicated that there were some distresses among each type of pavement

      (currently there are four types of pavements: Flexible, Composite, Jointed Concrete and

      Continuously Reinforced Concrete or CRCP) which were rarely observed in the past. The

      reasons for such occurrences and the use of this information to enhance the current

      system are discussed in the report.

      A statistical method known as: Classification Tree, was used to analyze the

      available PCR and maintenance actions data for the purpose of (1) Rating the pavements,

      and (2) assigning a maintenance and/or rehabilitation (M&R) action when distresses of the

      pavement-are known. The results of this analysis indicated that due to non-linear nature

      of pavement rating, this model was able to assess the pavement condition better than the

      current linear model of estimating the PCR.

      An expert opinion survey was designed and conducted to collect data on the

      pavement ratings and recommended M&R actions. Several pavements of each pavement

      type were included in this survey. A combination of "Classification Tree" and "Proportional Odds Model" was used to analyze the data and develop new weights for the pavement

      distresses of each type of pavement. The PCR values of individual pavement sections, an

      entire route as well as the entire roadway network were calculated. from new and old

      distress weights and the results were compared. These comparisons indicated that the

      Pavement Condition Ratings obtained from the new weights were able to delineate certain

      pavement conditions better than the old weights and the pavement Ratings were not

      dependent upon the type of pavement when new distress weights were used.

      Statistical analysis of the PCR data collected by the ODOT for the year 1996 was

      performed to determine a suitable sample size which can be used to survey the NHS

      network for collecting the PCR data of the network for Pavement Management purposes

      and selecting the pavements for inclusion in the annual M&R program of the ODOT. If the

      recommended procedure is implemented, it can save some time in the annual PCR data


      The report contains recommendations for: (1) revising-the list of distresses of each

      pavement type, (2) developing a non-linear model to assess the pavement condition Rating

      and M&R needs of any given pavement, (3) a suitable sampling procedure to survey the

      network, and (4) revising the definitions of some distresses of each pavement type.

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