LTPP Technical Support Services Contractor Reference Materials
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Data User's Corner





Data User's Corner


Table Navigator Online

Table Navigator Online

Table Navigator is an online schema for the LTPP database.

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Directives

Directives are documents issued by the organization in control of LTPP (currently the FHWA LTPP team) which transmit directions to the various LTPP contractors. Some of them are for purely administrative purposes, such as those that deal with software upgrades. Others, such as those that deal with data collection practices, may be of great interest to analysts and others collecting similar data. Most of these Directives are converted from the original electronic files, except for some (primarily from the early days of LTPP) for which the electronic files could not be found. In these cases, the documents were scanned and the resulting files are significantly larger than the converted documents. Formatting details such as fonts and pagination may be inconsistent with the printed documents, and therefore these files should be used for reference purposes only.

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