To answer that challenge, the program launched a new Web-based data portal, LTPP
InfoPave[TM], in January 2014 at www.
As opposed to the input variables for the New Road dataset the test temperature had to be excluded, since all performance data for the LTPP
dataset were only determined for a temperature of 20 [degrees]C.
database contains material, design and construction data including physical inventory data, material properties from in-situ and laboratory tests (LTPP
Evidence from the various kinds of data served to contextualise, describe and evaluate the outcomes of the 2007 LTPP
FHWA's Aramis Lopez, team leader for the LTPP
program, says accelerated pavement testing complements these LTPP
field performance studies.
Calibration of the guide's design models against local conditions is particularly important in Louisiana, as the national calibration for the Design Guide uses LTPP
data, among other data sources.
Since that time, more of the state-submitted LTPP
program data has passed quality screening and is now available.
One new feature is the integration of images of pavement distress from LTPP
test sites, previously available only by special request.
This TechBrief provides a summary of results from the statistical analysis of data collected during the LTPP
program comparing the performance of recycled HMA to virgin mix in flexible pavement overlays.
Since 1989, the LTPP
program has monitored nearly 2,500 pavement test sections throughout the United States and Canada.
FHWA recently added a 60-terabyte server to house the LTPP
program's visible legacy is the 20-plus-year performance database for use by researchers and practitioners now and well into the future," says Ralph Haas, distinguished professor emeritus in the Department of Civil Engineering at Canada's Waterloo University.