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Coordinating, Developing, and Delivering Highway Transportation Innovations

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Publication Number:  FHWA-RD-97-099    Date:  January 1998
Publication Number: FHWA-RD-97-099
Date: January 1998


Rehabilitation Performance Trends: Early Observations From Long-Term Pavement Performance (LTPP) Specific Pavement Studies (SPS)

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Among the more pressing questions facing pavement engineers are those related to the timing and effectiveness of different rehabilitation strategies. Three of the Specific Pavement Studies (SPS) experiments within the Long Term Pavement Performance (LTPP) program (SPS-5, SPS-6, and SPS-7) were undertaken to address some of these questions. This report documents the findings of a first look at the performance of the SPS-5, -6, and -7 test sections after 3 to 4 years of service. While it is too early in the life of these test sections to draw definitive conclusions about their long-term performance, differences in the performance of the various strategies have been observed. In addition, problems that can lead to early failure of the rehabilitation treatments considered are identified.

This report will be of interest to all engineers involved in the rehabilitation of highway pavements. It will be of special interest to the States participating in the LTPP rehabilitation experiments.

Charles J. Nemmers, P.E.
Office of Engineering
Research and Development


This document is distributed under the sponsorship of the Department of Transportation in the interest of information exchange. The United States Government assumes no liability for its contents or use thereof. This report does not constitute a standard, specification, or regulation.

The United States Government does not endorse products or manufacturers. Trade and manufacturers' names appear in this report only because they are considered essential to the object of the document.


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