LTPP IMS User Guide
This document provides information to aid in understanding and using the Long-Term Pavement Performance (LTPP) program’s pavement performance database. This document 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, how to obtain data, and example Structured Query Language (SQL) scripts that can be used to build user-defined custom extractions. The document is updated for each standard data release (SDR) of LTPP data. It also includes information on the database files used by the LTPP Traffic Analysis Software (LTAS) which is included in the SDR.