Evaluation of MDOT's Distress Thresholds for Maintained June 30, 2012 Pavement Projects

Details

• Creators:
  Qi, Yan ; El Gendy, Amin ; Wang, Feng
• Corporate Creators:
  Jackson State University. Institute for Multimodal Transportation
• Corporate Contributors:
  Mississippi. Dept. of Transportation
• Subject/TRT Terms:
  • Pavement maintenance
  • Pavement distress
  • Pavement performance
  • Pavement management systems Pavement warranty
  • Pavement distress
  • Distress survey
  • Deduct point
  • Threshold value
  • Pavement performance
  • Pavement management system (PMS)
• Publication/ Report Number:
  State Study No. 221
• Resource Type:
  Tech Report
• Geographical Coverage:
  Mississippi
• Edition:
  Final project report.
• Corporate Publisher:
  Jackson State University. Institute for Multimodal Transportation
• Abstract:
  As an alternative to traditional contracting, pavement warranty has been adopted in Mississippi since 2000, aimed to ; enhance pavement performance and protect the investment in pavement construction. Currently, a manual distress survey ; method and the associated deduct point-based pavement condition rating approach are employed to monitor the ; performance of warranty pavements (maintained projects). The main objective of this study is to evaluate the ; appropriateness of using the current deduct points and distress thresholds to monitor the performance of the maintained ; projects in Mississippi. In the study, a comprehensive literature review and online survey were conducted to review the ; recent state of practice of pavement warranty in North America. The analytical section of the study employed pavement ; distress and riding quality data collected from warranty pavements and the corresponding data of non-warranty pavements ; stored in MDOT’s Pavement Management System (PMS) for the statistical analysis. Using raw data, converted deduct ; points, and composite index as performance indicators, basic statistics were developed to investigate the distribution of ; performance indicators at various service times and the corresponding percentiles associated with the existing threshold ; values. In addition, pairwise comparisons were conducted to examine the evolvement of distress over time for warranted ; and non-warranted pavements. Further, two sample t-tests were performed to compare the performance of warranted and ; non-warranted pavements at the same service time. The survey study has shown that most other pavement warranty ; programs in other states use direct measurements of pavement distresses or densities of pavement distresses for their ; distress indicators and thresholds while the pavement warranty program at MDOT employs deduct points based distress ; thresholds which are quantities converted from measurements of pavement distresses. The analytical results show that the ; performance of the warranty pavements is significantly better than that of the non-warranty pavements at the same service ; time level, and warranty pavements can maintain at high service levels for a longer time than non-warranty pavements. ; The pavement warranty program adopted by MDOT has improved pavement performance, and is effective in practice. ; However, the current distress thresholds adopted by MDOT are inconsistent with regard to the various corresponding ; percentile levels for different distress types at a same service time, and the different increase rates of the percentile level ; for different distress types over service time. It is suggested that direct measurements of pavement distresses or distress ; densities be used as distress thresholds, and consistent threshold levels be implemented for all distress types.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24969/dot_24969_DS1.pdf
• File Type:
  [PDF - 1.12 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:437e0c6c67a83b6cfc350cbcdf0d5093b76cee60bbce6ba62f767f159a89d5ba00bebf3a76e654554df650445228765c3f49a2882899a2d07cfd8bdcf8c12f78