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Title: Reliability of the flexible pavement design model
Authors: United States. Assistant Secretary of the Army (R & D)
Potter, John C.
Keywords: California bearing ratio
CBR equation
Flexible pavements
Pavement design
Publisher: Geotechnical Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; GL-85-27.
Description: Miscellaneous Paper
Abstract: The design of flexible pavements by the US Army Corps of Engineers is currently based on the California bearing ratio (CBR) curve. The CBR curve is empirical, and the current design approach is deterministic. A probabilistic approach, providing more reliable designs at potentially lower costs, can be developed from the current design procedure, except that the reliability of the CBR curve is uncertain. This study was undertaken to establish the reliability of the current CBR-based flexible pavement design model, using existing data from accelerated traffic tests. The reliability of the design model was found to be 50 percent, excluding the effects of conservative estimates of the design parameters.
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