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FOREWORD Highway administrators, engineers, and researchers often face problems for which infor- mation already exists, either in documented form or as undocumented experience and prac- tice. This information may be fragmented, scattered, and unevaluated. As a consequence, full knowledge of what has been learned about a problem may not be brought to bear on its solution. Costly research findings may go unused, valuable experience may be overlooked, and due consideration may not be given to recommended practices for solving or alleviat- ing the problem. There is information on nearly every subject of concern to highway administrators and engi- neers. Much of it derives from research or from the work of practitioners faced with problems in their day-to-day work. To provide a systematic means for assembling and evaluating such useful information and to make it available to the entire highway community, the American Association of State Highway and Transportation Officials--through the mechanism of the National Cooperative Highway Research Program--authorized the Transportation Research Board to undertake a continuing study. This study, NCHRP Project 20-5, "Synthesis of Infor- mation Related to Highway Problems," searches out and synthesizes useful knowledge from all available sources and prepares concise, documented reports on specific topics. Reports from this endeavor constitute an NCHRP report series, Synthesis of Highway Practice. This synthesis series reports on current knowledge and practice, in a compact format, without the detailed directions usually found in handbooks or design manuals. Each report in the series provides a compendium of the best knowledge available on those measures found to be the most successful in resolving specific problems. PREFACE Performance-Based Maintenance Contracting (PBMC) provides incentives and disin- By Jon Williams centives to achieve desired outcomes or results from the maintenance contractor. This is distinct from the more usual practice for highway maintenance contracting--low bid Program Director combined with method specification. This report explores experience with PBMC in places Transportation where it has been adopted, including such issues as whether it has the potential to reduce Research Board costs and improve maintenance levels of service. Methods for implementing PBMC are also discussed. The report is likely to be useful for those agencies who are evaluating whether to include PBMC in their highway maintenance program. Information for this study was gathered by literature review of international experience, domestic U.S. state experience, federal government experience, and warranty contracts, as well as surveys conducted of state transportation agencies, Canadian provincial agencies, and a sampling of private firms. The surveys were augmented with individual interviews. William A. Hyman, formerly with Applied Research Associates, collected and synthe- sized the information and wrote the report. The members of the topic panel are acknowl- edged on the preceding page. This synthesis is an immediately useful document that records the practices that were acceptable within the limitations of the knowledge available at the time of its preparation. As progress in research and practice continues, new knowledge will be added to that now at hand.
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