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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations

This report is an archived publication and may contain dated technical, contact, and link information
Publication Number: FHWA-HRT-04-032

Key Findings From LTPP Analysis 2000-2003

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Local calibration can be carried out by identifying a set of representative pavements, developing the distress, materials, traffic, and climatic database for these pavements, and verifying the 2002 Pavement Design Guide against these local pavements. This process will identify whether or not any local calibration needs to be performed. In summary, if a State or Province plans to do local calibration, the calibration will be done with a set of different pavements other than the LTPP sections that were considered in the global models. In that case, the State or Province will need to develop a database for design inputs, such as local material properties, and the State or Province must either do this independently or pool resources with other States or Provinces that have similar conditions. the 2002 Pavement

The following example demonstrates how the LTPP data was used to develop and calibrate the design input libraries and the mechanistic-empirical models of the 2002 Pavement Design Guide. The local development and calibration process can be performed similarly.

Report No. NCHRP Project 1-37A


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