Welcome to the LTPP InfoPave web portal.
InfoPave is a user-friendly interface to access data collected by Federal Highway Administration’s
Long-Term Pavement Performance program.
Since 1989, the LTPP program has monitored more than 2,500 test sections on in-service
highways located throughout the United States and Canada to advance pavement design and
management practices.
LTPP data include pavement performance, materials, structure, traffic, and climate.
The Homepage provides an introduction to the LTPP program under About LTPP, and offers
access to the most commonly used features of the InfoPave portal.
The main menu tabs for LTPP InfoPave include Home, Data, Visualization, Analysis, Tools,
Library, Operations and Non-LTPP.
The most commonly used feature to access LTPP Data is “Data Selection and Download”
under the Data menu.
The “Find Sections” tab includes multiple filters that can assist in narrowing down
the search for test sections.
For example, if a user is interested in sections located in a specific State or Canadian Province,
the Location filter can be used.
“Find Sections” is available on many InfoPave features and the applied filters will be maintained
while navigating across multiple features.
After finding desired sections, users can select any number of desired data tables from
Pavement Structure and Construction, Climate, Traffic, and Performance categories.
Choosing the “Add to Selection” button will add the selected tables and fields for
the filtered sections to the “Selected Data” panel.
Users may preview, edit or remove each item until they are satisfied with the selection.
The selected data for the specific date range can then be added to the data bucket.
On the “Data Bucket” page, users can submit the data for extraction in the desired format
and unit system.
The “Section Summary Report” feature under the Data menu presents summary data for each
LTPP test section in both tabulated and graphical formats.
These summary data tables can be exported to Excel or saved in PDF format by clicking
on the Print Report button.
The "Graphs" tab under the Section Summary Report provides plots for several section
summary data attributes as a function of time.
For example, by selecting the "Average International Roughness Index", users can view a graph of
the section average IRI measurements for each profile date.
The maintenance and rehabilitation events through the section lifetime are included
on the graphs as vertical lines.
All graphs can be saved as images or their data can be exported to an Excel file.
The Section Summary Report also provides the capability to compare data from multiple test
sections, side by side, Data and Graphs for up to four test sections
can be displayed on the screen.
Users can also export comparison data tables for up to 25 sections in an Excel file.
The “State/Province Summary Report” feature under the Data menu displays key information
regarding all LTPP test sections in the State or Province selected by users.
Each row in the data tables provides the summary data for one test section and a hyperlink
to the corresponding Section Summary Report.
The Data menu includes many more features to extract and download LTPP data.
The “Data Feedback” form under the Data menu allows users to report inaccuracies found
in the data accessed on this web portal for further investigation by the FHWA LTPP Team.
The Visualization menu houses several tools to view LTPP data in an intuitive manner.
LTPP Section Mapping displays the selected test sections geographically on Google Maps.
Users can click or hover the cursor on any marker on the map to see the State Code and
SHRP (pronounced SHARP) ID of the corresponding test section.
Once a section is selected, the "Go To…" button can be used to navigate to other popular
InfoPave features such as Section Summary Report, which includes further information
for that section.
The Section Timeline feature presents the events history for each LTPP test section,
including the construction, maintenance or rehabilitation, traffic and climate data collection,
and performance monitoring activities in a chronological format.
Pavement Cross-Section Viewer demonstrates the change in the pavement layer structure
for the selected section with respect to time.
The maintenance and rehabilitation events are marked by red pointers under the slider
bar.
Users can see any added or removed layers as a result of the construction events.
Transverse Profile Viewer visualizes the transverse profile data collected using a laser device.
This includes downward pavement images and forward-facing images, a plot of the transverse
profile and key corresponding indicators.
The Analysis menu houses several features to facilitate analysis using LTPP data.
The LTPP Data Analysis Plan allows easy access to research reports and projects that are
completed, in progress, or planned.
The Data Availability Chart visualizes the extent of LTPP data that is available for
a given data attribute.
For each attribute, the corresponding piece of the pie shows the number of test sections
that contain this type of data.
In the LTPP Data Contest page, students can access the data analysis contest guidelines
and winning papers from previous years.
The tools page provides access to a variety of web-based and downloadable tools developed
by the LTPP program.
These tools have been developed based on LTPP data and can be used in various pavement engineering
applications.
The LTPP Climate Tool is one of the most frequently used InfoPave tools that provides access to
the second version of NASA’s Modern-Era Retrospective analysis for Research and Applications,
MERRA-2 climate dataset.
This data is organized in Precipitation, Temperature, Wind, Humidity, and Solar data categories.
Data for each category is available at Hourly, Daily, Monthly, and Annual aggregation levels.
Climatic data displayed on the map can be downloaded in ESRI Shape File, SHP, and Keyhole
Markup Language, KML file formats.
The Library page provides access to reports, protocols, manuals, and other documents in
the LTPP Reference Library.
Documents are organized in user-friendly categories and a search utility is provided to look for
documents of interest.
The Non-LTPP page provides access to research datasets developed by other research programs
that are important to pavement engineering research and practice.
This web-centric interface is a powerful and flexible tool that allows professionals, researchers,
and students to visualize, extract, and use the LTPP data.