A linear discriminant function named the Driver Improvement Index developed in previous research sponsored by the Pennsylvania Department of Transportation was applied to a novel and expanded group of drivers to test its accuracy in classifying accident-involved versus non-accident-involved operators, using historical accident data. A superior level of accuracy for the instrument as compared to the number of points on a driver's record was clearly indicated, in terms of correct accident group classifications. Refinements to the instrument were suggested and also evaluated in the project. Driver improvement program treatments were developed, implemented, and evaluated in the research, targeted to three levels of demonstrated negligence (points). These interventions included an advisory/warning letter, a Special Written Point Examination, and a classroom exercise for small groups labeled Decisions for Safe Driving. While the letter achieved moderate effectiveness in violation reduction and the written examination achieved significant reductions in both accidents and violations, the class failed to demonstrate a benefit on either measure.


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    Driver Improvement Index

    J. A. McKnight | NTIS | 1988


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    L. K. Staplin / K. Y. Knoebel | NTIS | 1985



    Driver Improvement

    NORDH CHRISTIAN | European Patent Office | 2022

    Free access