The degree of accuracy with which the Falling Weight Deflectormeter (FWD) data are collected and analyzed has a direct impact on the conclusions drawn in many aspects of TxDOT operation. TxDOT owns 15 units, the largest FWD fleet of any single transportation agency in the world. TxDOT purchased its first unit in 1983 and has added additional FWDs on three- or four-year cycles over a span of 15 years. Therefore, the current fleet includes FWD units of different vintages and units with different components. Both good repeatability and reproducibility are considered to be of major importance for an adequate interchangeability of the FWD fleet. The first two tasks of the project consisted of evaluating the reproducibility of the FWD fleet. The first two tasks of the project consisted of evaluating the reproducibility and repeatability of the fleet and study the impact of the components on the reproducibility and repeatability of a given FWD. This report contains a summary of the results from these two tasks.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Reproducibility of Texas Department of Transportation Falling Weight Deflectometer Fleet


    Contributors:
    S. Rocha (author) / V. Tandon (author) / S. Nazarian (author)

    Publication date :

    2001


    Size :

    150 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Falling Weight Deflectometer Correlation

    Zaghloul, Sameh / Ahmed, Zubair / Swan, D. J. et al. | Transportation Research Record | 2005


    Falling-Weight Deflectometer Correlation

    National Research Council (U.S.) | British Library Conference Proceedings | 2005


    Falling Weight Deflectometer Correlation

    Zaghloul, Sameh / Ahmed, Zubair / Swan, D. et al. | Transportation Research Record | 2005


    Comparing Traffic Speed Deflectometer and Falling Weight Deflectometer Data

    Levenberg, Eyal / Pettinari, Matteo / Baltzer, Susanne et al. | Transportation Research Record | 2018


    Network-Level Falling Weight Deflectometer Testing

    Alam, Javed / Galal, Khaled A. / Diefenderfer, Brian K. | Transportation Research Record | 2007