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Standard Data Release
The world's largest and most comprehensive pavement performance database is at your fingertips with the Standard Data Release (SDR) from the Federal Highway Administration's (FHWA) Long-Term Pavement Performance (LTPP) program. The data is primarily available in Microsoft Access® format, but very large tables that require many Access tables to distribute are provided in SQL Server format. Users requiring less than complete sets by data type or agency should consider the Data Selection and Download options to pre-select data for analysis.
This is not the latest LTPP Standard Data Release. It should be noted that multiple revisions and corrections have happened since previous releases.
The latest release (SDR 34) provides the most complete and accurate LTPP data. This previous release has been provided as a reference for past research conducted using LTPP data.
The User’s Guide to the LTPP Information Management System (IMS) corresponding to this SDR is also available.
Disclaimer: The MERRA climatic data included in the LTPP Standard Data Release #29 and updates through SDR 30 have been replaced with MERRA-2 as of July 2017. Please contact LTPP Customer Support at ltppinfo@dot.gov if you have any questions.
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