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Study of Georgia’s pavement deterioration/life and potential risks of delayed pavement resurfacing and rehabilitation : final report.
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2016-08-01
[PDF-2.87 MB]
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Alternative Title:Georgia DOT research project 14-05 : study of Georgia's pavement deterioration/life and potential risks of delayed pavement resurfacing and rehabilitation : final report.
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Edition:Final report
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Abstract:Georgia has continuously been rated as one of the states with the smoothest pavements in the United States
because the Georgia Department of Transportation (GDOT) has established a standardized pavement condition
evaluation system (PACES) for consistent annual pavement performance monitoring. GDOT also established an
active, data-driven annual pavement preservation program that determines pavement preservation methods (i.e.,
treatment criteria), prioritization of the projects (e.g., rating, AADT, etc.), and allocation of the maintenance and
rehabilitation funding, using PACES data. This rich pavement performance data from FY 1986 to FY 2014 is
extremely valuable because they reveal the actual pavement performance in Georgia. This project is: 1) to study
the actual pavement performance of GDOT’s in-service pavements using 28-year of pavement condition
evaluation data; 2) to study the pavement resurfacing delay situation; and 3) to study the impact of pavement
resurfacing delay with a special focus on the pavement resurfacing effectiveness/life and the increases in
construction and user costs. Two types of pavement service interval were studied in this project: “Pavement
Resurfacing Interval,” which represents the time period between two consecutive resurfacing activities, and
“Pavement 70 Interval,” which represents the time period to reach a rating of 70 that can be used for a consistent
performance comparison. After extensive data screening and processing, a total of 370 resurfacing cycles with
high-quality data were selected for analysis. The pavement resurfacing interval and pavement 70 interval is 11.6
and 10.3 years, respectively. Study of selected resurfacing cycles with high traffic volume shows the resurfacing
effectiveness (Pavement 70 Interval) decreases more than 10% (1 year) at every 5-point drop of COPACES rating
when resurfacing is conducted at a rating less than 70. Results indicate the resurfacing delay has significant
negative impact on resurfacing effectiveness. More data, especially projects with different traffic volumes, are
needed to study the consequence of delayed resurfacing.
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