Determination of the appropriate use of pavement surface history in the KDOT life-cycle analysis process.
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Determination of the appropriate use of pavement surface history in the KDOT life-cycle analysis process.

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  • English

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      Final report
    • Abstract:
      The primary objective of this study was to evaluate KDOT’s pavement surfacing history and recommend

      whether or not the department’s life-cycle cost analysis (LCCA) procedure should include a surfacing history

      component, and, if so, how the LCCA process should be revised/ updated to incorporate surfacing history.

      An analysis using KDOT’s databases demonstrated that they could be used to estimate performance of

      new or reconstructed pavement lives for use in the LCCA process. For the predominant pavement types used

      in Kansas, full-depth asphalt concrete (FDAC) and doweled, jointed plain concrete (JPC-D), service lives were

      estimated to be 12 years and 20 years, respectively. These compare with 10 years and 20 years currently being


      The impact of modifying the service lives for FDAC and JPC-D pavements was evaluated using the LCCA’s

      of 12 recent KDOT construction/reconstruction projects. The LCCA’s were obtained and re-computed using lifecycle

      models formulated from results of the performance analyses conducted for FDAC and JPC-D pavements

      and for maintenance and rehabilitation (M&R) treatments applied to them. The resulting life-cycle costs were

      then compared with those computed by KDOT. It was found that modified performance lives resulted in only a

      negligible change in the overall NPV for both pavement types on the 12 projects evaluated.

      Three alternative methods for computing future rehabilitation costs for use in LCCA were presented and

      evaluated. One method, which utilizes a cost-to-own approach, warrants further evaluation and development. The

      advantage of the cost-to-own approach is that it does not require modeling of the service lives of the pavement

      being studied. It appears the cost data to perform this type of analysis are available in the KDOT data base.

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