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Abstract:This report presents the development of a combined smoothness specification for asphalt and concrete pavements
and associated training for the certification of profiler operators by highway agencies. The report discusses the
analyses conducted to develop appropriate levels of incentives and disincentives approximately equivalent to
previous specifications, as a baseline. A brief survey of current practices by other states is also included.
Appendices include the draft specification developed for this project, and the training materials that were presented
in several workshops as part of the project.
Features of the combined smoothness specification include the use of the International Roughness Index for
smoothness assurance on all pavements, certification of profiler operators, uniform electronic data filenames,
profile measurement in both wheel paths, the use of the ProVAL software (developed by FHWA), and areas of
localized roughness calculated by ProVAL.
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