The reliability of different statistical road accident severity models is assessed using a number of criteria, such as goodness of fit, robustness of risk factor coefficients, and intuitive acceptability and consistency of output. The results of this analysis suggest that model reliability is not sensitive to the number of injury classes specified in the model or to the level of model aggregation. All models consistently identified the same risk factors as explaining most of the variation in injury experience in the data. These factors are (a) dynamics of the accident, (b) seating position of occupant, (c) use of seat belts, and (d) age of occupant involved. There is no indication that a significant transfer of error takes place from one severity level to another in a sequential model structure. The results suggest that reliability of statistical road accident severity models depends primarily on the accuracy of information provided in the accident data.


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    Title :

    Reliability of Statistical Road Accident Injury Severity Models


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:


    Publication date :

    1996-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Reliability of Statistical Road Accident Injury Severity Models

    Saccomanno, F. / Nassar, S. / Shortreed, J. | Transportation Research Record | 1996



    Assessing the reliability of road accident severity models

    Saccomanno,F.F. / Nassar,S.A. / Shortreed,J.H. et al. | Automotive engineering | 1997