Errata Template

Reference Information and Examples

Data Analysis and Operations Feedback Report

In 1996, the Long-Term Pavement Performance (LTPP) program instituted a data analysis and operations feedback system to enable users of the LTPP database to report situations encountered during data analysis sponsored by the Federal Highway Administration that suggest or demonstrate the need for...

Transportation Pooled Fund Studies

A pooled fund study is a project to address a new area of research or improvement. When there is an interest presented in solving transportation-related problems, the research and planning associated with an investigation may be funded by several Federal, State, regional, and local...

Distress Identification Manual for the Long-Term Pavement Performance Program (Fifth Revised Edition)

Manual developed to provide a consistent, uniform basis for collecting distress data on the LTPP program. The manual provides a common language for describing cracks, potholes, rutting spalling, and other pavement distresses. 

Falling-Weight Deflectometers Calibration

Falling Weight Deflectometer (FWD) calibrations are critical for highway monitoring activities. FWDs must be calibrated and used properly, otherwise, measurements will be inaccurate. A first generation FWD calibration system was developed in the early 1990s for the Strategic Highway...

LTPP Products

Products derived from the Long-Term Pavement Performance (LTPP) program have been made available to State departments of transportation and other segments of the highway community since the early years of the program. Initially, these were methods, guidelines, and procedures for standardized...

Long-Term Pavement Performance Program Data Analysis

The Long-Term Pavement Performance (LTPP) Program data analysis projects takes the raw data collected from the program's more than 2,500 pavement test sections and converts them into useable information. The projects address a broad array of topics—from field validation of pavement design...

Structures Research and Development (R&D)

FHWA's bridge and structures research and development provides technologies and solutions to advance the state-of-the-art and practice in highway infrastructure engineering. FHWA's bridge and structures research is carried out as an integral part of FHWA's broader Infrastructure Research and...

How To Get LTPP Data

LTPP InfoPave™ 

Launched in 2014, the Long-Term Pavement Performance (LTPP) InfoPave™ web portal is the public gateway to access data and other information about the program. The web portal is designed...