United States Department of Transportation
i
Iowa pavement asset management decision-making framework.
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2015-10-01
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[PDF-1.75 MB]
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Abstract:Most local agencies in Iowa currently make their pavement treatment decisions based on their limited experience due primarily to
lack of a systematic decision-making framework and a decision-aid tool. The lack of objective condition assessment data of
agency pavements also contributes to this problem.
This study developed a systematic pavement treatment selection framework for local agencies to assist them in selecting the most
appropriate treatment and to help justify their maintenance and rehabilitation decisions. The framework is based on an extensive
literature review of the various pavement treatment techniques in terms of their technical applicability and limitations,
meaningful practices of neighboring states, and the results of a survey of local agencies. The treatment selection framework
involves three different steps: pavement condition assessment, selection of technically feasible treatments using decision trees,
and selection of the most appropriate treatment considering the return-on-investment (ROI) and other non-economic factors.
An Excel-based spreadsheet tool that automates the treatment selection framework was also developed, along with a standalone
user guide for the tool. The Pavement Treatment Selection Tool (PTST) for Local Agencies allows users to enter the severity and
extent levels of existing distresses and then, recommends a set of technically feasible treatments. The tool also evaluates the ROI
of each feasible treatment and, if necessary, it can also evaluate the non-economic value of each treatment option to help
determine the most appropriate treatment for the pavement.
It is expected that the framework and tool will help local agencies improve their pavement asset management practices
significantly and make better economic and defensible decisions on pavement treatment selection.
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