This Guide is designed to help users of the Long-Term Pavement Performance (LTPP) database navigate the available traffic data and computed parameters in the LTPP InfoPave™ web portal. The Guide identifies traffic parameters suitable for different pavement analyses and details how to use InfoPave to extract the desired data.

The Guide consists of two parts. Part 1 describes traffic parameters available through LTPP program sources and provides details about the methods used to collect traffic data and compute traffic parameters. It also contains recommendations for the most applicable traffic parameters for different types of pavement analyses. Part 2 provides practical examples and details on how to use InfoPave to identify and extract various traffic parameters for LTPP sites.

The methodologies presented in this report can be applied beyond the LTPP program to assist highway agencies in the computation of traffic statistics necessary to support pavement design, research, management, and forensic investigations. Contractors, researchers, and consultants can also benefit from this research.

Recommended citation: Federal Highway Administration, Guide to Select Long-Term Pavement Performance Traffic Data for Multiple Uses
(Washington, DC: 2024) https://doi.org/10.21949/1521493