Reliable Statewide Pavement-Performance Study Using a Confidence Evaluation System
Publication: Journal of Transportation Engineering
Volume 138, Issue 3
Abstract
There is an urgent need to develop a system to quantify survey data quality and to study pavement performance characteristics with levels of confidence. To address this need, a system is proposed to quantify historical asphalt pavement condition survey data quality. The proposed confidence evaluation system uses the indicators based on asphalt pavement life-cycle characteristics. The resulting confidence levels of the indicators are used to determine the confidence level of the analyzed pavement’s life curves and performance characteristics. Twenty-three years of asphalt pavement condition survey data were provided by the Georgia Department of Transportation (GDOT) to validate the proposed system. The pavement’s life curves that have a high-confidence level can be obtained and used to analyze actual pavement performance; the average life of resurfacing effectiveness at a rating of 70 is approximately 9.4 years; this closely matches GDOT engineers’ assumption of 10 years of life, which is used for routine life-cycle cost analysis. The average project resurfacing time span, however, is 11.4 years, which indicates a 2-year lag for pavement preservation. More than 67 percent of the resurfacing projects are being delayed by more than one-year, indicating a serious problem. The derived load cracking propagation data indicates that this data can be used to support the development of reliable pavement life forecasting models.
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Acknowledgments
This paper was sponsored by the Georgia Department of Transportation (Project No. GADOT2006). The continuous support and involvement of the Office of Maintenance and the Office of Materials and Research of GDOT are greatly appreciated. The authors would like to thank Yiching Wu, Nathan Rumsey, and Cuizhen Shen for preparing and processing pavement condition data. In addition, the authors would like to thank the support provided by the Program for Changjiang Scholars and Innovative Research Team in University (UNSPECIFIEDNo. 1050) to exchange current Chinese pavement management practices.
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Information & Authors
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Published In
Journal of Transportation Engineering
Volume 138 • Issue 3 • March 2012
Pages: 339 - 347
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Sep 17, 2010
Accepted: Jul 20, 2011
Published online: Jul 22, 2011
Published in print: Mar 1, 2012
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