Details:

Creators:
Qi, Yan ; El Gendy, Amin ; Wang, Feng
Qi, Yan ; El Gendy, Amin ; Wang, Feng Less -
Corporate Creators:
Jackson State University. Institute for Multimodal Transportation
Corporate Contributors:
Mississippi. Dept. of Transportation
Subject/TRT Terms:
[+]
Deduct Point Distress Survey Pavement Distress Pavement Maintenance Pavement Management System (PMS) Pavement Management Systems Pavement Performance Pavement Warranty Threshold Value
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.


Format:
PDF
Collection(s):
US Transportation Collection University Transportation Centers
Main Document Checksum:
[+]
urn:sha256:55c619b98b45ee520a24ee88ef8968f56b2a85a7e7bce2e1d2d02f60740c61f2
Download URL:
https://rosap.ntl.bts.gov/view/dot/24969/dot_24969_DS1.pdf
File Type:

Supporting Files

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