United States Department of Transportation
i
Comprehensive Evaluation of Pavement Maintenance Activities Applied to Colorado Low-Volume Paved Roads-Phase II
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2018-02-01
[PDF-3.97 MB]
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Abstract:The primary objective of this report is to document the effectiveness of low-cost treatments applied to low-volume roads (LVRs) in Colorado. By analyzing historical pavement performance data and treatment records, the effectiveness of each treatment type was determined. It was concluded that some surface maintenance strategies are effective long-term treatments for fatigue, longitudinal, and transverse cracking. However, the effectiveness of these treatments depends mainly on the initial condition index. An alternative maintenance strategy was proposed for CDOT considering a light rehabilitation technique with a surface treatment for poor roads. A long-term analysis of road maintenance and costs was conducted on a case study in Colorado. The results show the impact of both current and proposed maintenance strategies on the future of pavement condition. It was found that the proposed strategy would enhance the effectiveness of current policies followed by CDOT. This report also investigates the badly deteriorated LVRs in Colorado considering a specific characteristic of marginal pavement conditions. Different treatment strategies were evaluated to explore how reliable applying more pavement maintenance techniques is on these roads. The analysis of funding needs shows that marginal roads can be improved effectively within a maintenance capital improvement plan of five years from 2016 to 2020. Implementation CDOT is advised to consider specific criteria while applying chip seals and thin overlays on roads. Chip seals shall be applied only while the pavement is still performing well. Pavement performance should be evaluated effectively considering the individual pavement condition indices rather than the overall drivability life value. Cold in-place recycling and full depth replacement are recommended to be integrated with the current applications of chip seals and thin overlays.
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