Long-Term Pavement Performance Studies The Long-Term Pavement Performance program (LTPP) is the largest pavement performance research program ever undertaken, gathering data from 2,000 pavement test sections over a 20-year test period. The Federal Highway Administration (FHWA) has operational responsibility for the studies and maintains a resource web site for current and historical information. With almost two decades of data collection and analysis now available, valuable insights, innovations, and products will emerge from the LTPP studies in the next several years. What has been accomplished so far and what is needed to realize the promise of the 20-year LTPP effort are identified in Fulfilling the Promise of Better Roads: A Report of the TRB Long-Term Pavement Performance Committee and Preserving and Maximizing the Utility of the Pavement Performance Database.
The Long Term Pavement Performance program review committee is a policy study that advises the Federal Highway Administration and the American Association of State Highway and Transportation Officials on the conduct of a 20+ -year study of in-service highway pavements in the U.S. and Canada to improve understanding of the causes and mechanisms of deterioration due to a variety of causes. This NRC appointed committee is aided by expert task groups (ETGs) and sponsors the semi-annual meeting of the Data Analysis Working Group (DAWG).