United States Department of Transportation
i
Performance evaluation of Arizona's LTPP SPS-5 project : strategic study of rehabilitation of asphalt concrete pavements.
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2015-06-01
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[PDF-3.69 MB]
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Abstract:As part of the Long Term Pavement Performance (LTPP) Program, the Arizona Department of Transportation
(ADOT) constructed 11 Specific Pavement Study‐5 (SPS‐5) test sections on Interstate 8 near Casa Grande. The
SPS‐5 project studied a variety of different rehabilitation methods for asphalt concrete pavements. The
project was opened to traffic in 1990 and monitored at regular intervals until it was placed out of study in
2009. Surface distress, profile, and deflection data collected throughout the life of the pavement were used
to evaluate the performance of rehabilitation methods using unique combinations of minimal and intensive
surface preparation, virgin and recycled asphalt, and thick and thin overlay thicknesses. This report
documents the analyses conducted as well as practical findings and lessons learned that will be of interest to
ADOT.
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