About LTPP

The Long-Term Pavement Performance (LTPP) program was established to collect pavement performance data as one of the major research areas of the Strategic Highway Research Program (SHRP). The first 5 years of the LTPP program were completed under the funding and direction of SHRP. Since 1991, the Federal Highway Administration (FHWA) has continued the management and funding of the program. The LTPP program is managed by the Long-Term Infrastructure Performance Team (HRDI-30) under the Office of Infrastructure Research and Development.

The LTPP program is a large research project that includes two fundamental classes of studies and several smaller studies to investigate specific pavement related details that are critical to pavement performance. The fundamental classes of study are the General Pavement Study (GPS) and the Specific Pavement Study (SPS) experiments. The combined GPS and SPS experiments consist of over 2,500 test sections located on in-service highways throughout North America. The LTPP program monitors and collects pavement performance data on all active sites. The collected data include information on seven modules: Inventory, Maintenance, Monitoring (Deflection, Distress, and Profile), Rehabilitation, Materials Testing, Traffic, and Climatic.

The LTPP Information Management System (IMS) is the central database where all the data collected under the LTPP program are stored. The LTPP IMS was established in 1988. This database is continuously being developed as more data are collected and processed. Four regional offices were established under the LTPP program to coordinate and communicate LTPP-related activities throughout the United States and Canada. While the four regions are still maintained, only one office or contractor handles the data collection and coordination activities for all four regions. 

Highlights and Features

• LTPP Data Analysis Plan
• Calibrating the Falling Weight Deflectometer (FWD)
• The LTPP Newsletter
• 2023 LTIP Data Analysis Student Contest
• LTPP Webinar Recordings

LTPP Webinar Recordings

• Direct Application of LTPP Data and Products on the MEPDG
• Introduction and Demonstration of LTPP
• Results from Recently Concluded LTPP Data Analysis Studies
• Improving Public Access to LTPP Data
  • Role and Responsibilities of LTPP State Coordinators
  • LTPP's Impact to Our Industry Partners
  • LTPP's Warm-Mix Asphalt Experiments
  • “LTPP InfoPave” Access to Everything LTPP
  • New Mexico and Texas First to Build New SPS-10 Test Sections
  • LTPP Data Analysis Projects