The study described in this report investigated the effects of alcohol and marijuana, alone and in combination, on driver performance and behavior in a fully interactive driving simulator. The simulator provided the driver a complex visual scene similar to a rural nighttime drive, and allowed the driver full control of steering and speed maneuvers. Performance and behavior data were collected during a 10-12 mile drive requiring about 15 minutes to complete. A variety of events were encountered during the drive, including curves, obstacles in the roadway, and winding roads. Accidents, tickets, and speed were recorded as traffic safety measures during the overall drive. Driver behavior, speed control, and steering performance were collected during each event to provide insight into the impairment mechanisms of alcohol and/or marijuana on the driver. Based on a large number of driver performance and behavior variables, alcohol was found to have a pervasive and significant impairing effect. Marijuana effects were minimal. A significant drug interaction effect was observed in simulator accidents.


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    Title :

    Simulator Study of the Combined Effects of Alcohol and Marihuana on Driving Behavior - Phase 1


    Contributors:
    A. C. Stein (author) / R. W. Allen (author) / M. L. Cook (author) / R. L. Karl (author)

    Publication date :

    1983


    Size :

    85 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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