Future Improvements for Design of Flexible Pavement Structures

by Brent Rauhut, Brent Rauhut Engineering Inc, Austin, United States,

Document Type: Proceeding Paper

Part of: Pacific Rim TransTech Conference—Volume II: International Ties, Management Systems, Propulsion Technology, Strategic Highway Research Program


The first set of data analyses on the National Pavement Data Base (NPDB) derived from the Long-Term Pavement Performance (LTPP) activities have been completed. The results from sensitivity analyses for rutting, change in roughness, and transverse cracking are reported briefly in this paper, as well as the results from evaluation of the AASHTO Flexible Pavement Design Equation and recommendations for improvements in design procedures. Two of the major outputs expected from this research activity were: 1) Characterization of the data in the NPDB, its biases and shortcomings, and 2) Recommendations for future analyses when more time-sequence data becomes available. These results also are discussed briefly.

Subject Headings: Pavement design | Asphalt pavements | Sensitivity analysis | Structural analysis | Data analysis | Databases | Pavement condition | Pavement rutting

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