The report examines the effectiveness of an on-road, spot check method of conducting vehicle inspections. The study concentrated on an enhanced program which was operated in three Michigan counties. The proportion of the vehicle population inspected was systematically varied across counties with 5%, 10%, and 20% levels being used. Independent measurements were collected on vehicle condition, through a random sample of 6,000 vehicles, which were given a full inspection. An additional 43,000 vehicles were observed for lighting system outages, and 5,500 drivers were interviewed. For a six month observation period, a modest reduction in vehicle defects, between 5% and 10%, was obtained in the area with the heaviest concentration of inspection activity. Driver interviews showed no decrease in public acceptance of the program with increased police effort. Follow-up procedures were found to be quite effective in obtaining the repair of defective vehicles.


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    Title :

    An Evaluation of the Michigan Trial Substitute Motor Vehicle Inspection Program


    Contributors:

    Publication date :

    1974


    Size :

    336 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English