Describes the information management system (IMS) of the Long-Term Pavement Performance Program (LTPP), available LTPP data, and means of access to the data.

"This document provides information on the Long-Term Pavement Performance (LTPP) program ancillary information. Ancillary information includes data, images, ref

This document provides information to aid in understanding and using the Long-Term Pavement Performance (LTPP) program's Pavement Performance Database (PPDB), L

The Long-Term Pavement Performance Information Management System (LTPP IMS) Data Users Reference Manual contains an overview of the LTPP program and the data av