2004PDFTech Reporthttps://www.fhwa.dot.gov/publications/research/infrastructure/pavements/ltpp/reports/04032/https://www.fhwa.dot.gov/publications/research/infrastructure/pavements/ltpp/reports/04032/04032.pdfFHWA-HRT-04-032Pavement performanceResearchPavement maintenanceUnited StatesUnited States. Federal Highway AdministrationUnited States. Federal Highway AdministrationTurner-Fairbank Highway Research CenterFederal Highway AdministrationThe Long-Term Pavement Performance (LTPP) program established in 1987, is a comprehensive 20-year study of in-service pavements using a series of rigorous long-term field experiments to monitor more than 2,400 asphalt and portland cement concrete (PCC) pavement test sections across the United States and C...