The National Academies

NCHRP 20-50(10) [Completed]

LTPP Data Analysis: Factors Affecting the Performance of Flexible and Rigid Pavements

  Project Data
Funds: 0
Research Agency: Arizona State University
Principal Investigator: Emmanuel Owusu-Antwi
Effective Date: 4/17/2000
Completion Date: 10/16/2001

Project has been canceled; research will be performed as part of NCHRP Project 20-50(10/16).

For specific site conditions (e.g., traffic level, climatic conditions, and subgrade type), the performance of flexible and rigid pavements will depend not only on pavement layer thicknesses and materials, but also on design and construction features (e.g., type and details of subdrainage, base, and shoulders). Recent research has documented, using limited analysis, the contribution of these features to achieving different levels of performance. However, the data available from the long term pavement performance (LTPP) studies are expected to provide the information needed to conduct a more rigorous analysis and develop well-supported conclusions regarding the importance of these features. Such analysis will identify site conditions and design and construction features that lead to different levels of performance of flexible and rigid pavements and determine the relative importance of these conditions and features. These findings will provide guidance for identifying appropriate features for different pavement types.

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