Long-Term Pavement Performance Studies
The LTPP data are being collected in a database known as the LTPP National Information Management System. The database includes information on environment, traffic, inventory, monitoring, maintenance, materials, and rehabilitation for each test section. Potential users of the database should first refer to the User Reference Guide, which provides an introduction to the structure of the LTPP program, the relational structure of the LTPP database, a description of the location of various data elements, contents of the data tables, tips on efficient means of manipulating data for specific types of investigations, and examples of Structured Query Language (SQL) scripts that can be used to build user-defined custom extractions.
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 TRB LTPP Committee monitors the status and progress of the LTPP studies and provides technical advice and assistance to the FHWA concerning courses of action and the future direction of the studies. The advice and recommendations of the committee are transmitted to the FHWA and to the American Association of State Highway and Transportation Officials (AASHTO) in letter reports.
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).
Contact Dr. Robert Raab, LTPP Program Manager, firstname.lastname@example.org