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Federal Highway Administration > Publications > Focus > April 2011 > Enter the World of LTPP Data

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Publication Number: HRT-11-012
Date: April 2011

Enter the World of LTPP Data

Tap into the world's largest and most comprehensive pavement performance database with the new Standard Data Release (SDR) 25 from the Federal Highway Administration's (FHWA) Long-Term Pavement Performance (LTPP) program. The SDR is in Microsoft Access© format and is available at no charge on DVD.

The release contains the complete LTPP pavement performance database. Since the LTPP program began in 1987, data have been collected on the performance of nearly 2,500 in-service pavement test sections throughout the United States and Canada. The test sections represent a range of climatic and soil conditions. Users of SDR 25 will find a tutorial on "Accessing LTPP Data," which provides step-by-step examples of working with the SDR and building queries for data extraction. An accompanying Reference Library DVD provides information on software utilities, resource documents, and research reports that support the database.

LTPP data have been translated into an array of products and tools for pavement engineers, including ones supporting data collection and equipment calibration. LTPP data have also played a critical role in helping State highway agencies validate and calibrate the Mechanistic-Empirical Pavement Design Guide.

To obtain a copy of SDR 25, contact LTPP Customer Support Services at 202-493-3035 (email: ltppinfo@dot.gov). For more information about the LTPP program, visit www.fhwa.dot.gov/research/tfhrc/programs/infrastructure/pavements/ltpp. Information about LTPP products and online access to the LTPP database are available at www.ltpp-products.com.

Figure 8. Photo. One of the nearly 2,500 in-service pavement test sections of the Long-Term Pavement Performance program. A sign on the right side of the roadway reads "ROAD TEST 331001." Traffic travels on the other side of the roadway.

Since the LTPP program began in 1987, data have been collected on the performance of nearly 2,500 in-service pavement test sections throughout the United States and Canada.

Updated: 01/28/2014

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