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FHWA > Engineering > Pavements > Research > LTPP > Analysis > Data Collection |
Data CollectionThe LTPP program monitors more than 2,400 asphalt and portland cement concrete pavement (PCC) test sections throughout the U.S. and Canada. A total of 792 of the LTPP test sections contain the common types of pavement in use in the U.S. (general pavement studies [GPS]), and 1,250 other test sections have been specially constructed to study certain engineering factors in pavement design (specific pavement studies [SPS]). At each GPS and SPS site, data on distress, roughness, structural capacity, traffic, and other variables are systematically collected. In addition, work groups of highway engineers periodically visit the sites to get a firsthand look at the pavements and to record their subjective observations. Selected sites within the GPS and SPS experiments were continuously monitored for temperature and moisture as part of the Seasonal Monitoring Program (SMP) study. For the Dynamic Load Response study, Various PCC sections within the SPS-2 project were chosen for a study on pavement response under controlled loading conditions. Additional information includes:
Falling-Weight Deflectometers (FWD) are critical for highway monitoring activities. FWDs, however, must be properly calibrated and used or else measurements taken will be inaccurate. To address this issue, the Strategic Highway Research Program (SHRP) and LTPP set up four regional FWD calibration centers. To contact these centers, click on the link provided below. Additional information can also be obtained from the Products section of this web page.
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More InformationEventsContactsAramis Lopez Customer Service |
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This page last modified on 06/02/06 |