Decision Tree for Unpaving Roads

The Minnesota Department of Transportation (Mn/DOT) and the Local Road Research Board (LRRB) initiated a preliminary investigation into the issues surrounding the maintenance, preservation and possible conversion of low-volume paved roads to gravel. Rising costs of pavement materials and stagnant or declining funds for road construction and maintenance prompted the agencies to begin looking into issues surrounding the decision to unpave low-volume roads. To assist in the process and to provide Mn/DOT and the LRRB with the best, most up-to-date information, CTC & Associates was asked to review the issues associated with the decision to convert paved low-volume roads to gravel roads. This research synthesis highlights relevant research and information related to road surfacing decisions, pavement preservation techniques, cost analysis and current road agency experiences. This report is organized into three sections: Local Road Agency Experiences, Road Surfacing Decisions and Criteria, and Pavement Preservation Techniques and Strategies.


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  • Accession Number: 01601833
  • Record Type: Publication
  • Created Date: Jun 2 2016 1:56PM