In 2000, the Long Term Pavement Performance (LTPP) completed an effort to resolve issues and questions associated with a portion of the LTPP data. LTPP's data resolution effort-a cooperative effort among the States. Provinces, American Association of State Highway and Transportation Officials (AASHTO), TRB-LTPP Committee, and FHWA-resulted in a significant increase in LTPP data, adjustments to the monitoring schedules for the LTPP sections, and the inception of a pooled-fund traffic data collection study. LTPP initiated the pooled-fund traffic data collection study to address the need for traffic data. The goal of this study is to increase the quality and quantity of monitored traffic data-volumes, classifications, and weights-from the program's Specific Pavement Studies (SPS) projects.


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