This paper outlines some results of research on the following questions about driver behaviour: (1) Over a period of years, do some drivers drive so that they increase their risk of crashing? (2) What aspects of their driving increases that risk? and (3) What personal characteristics underlie their risky driving practices? It was found that individuals are consistent over time in their accident liability, and quite consistent in the types of accident in which they become involved. Early driving experience seems to help to reduce the risk of most, but not all, types of accident. Driving speed was also found to be an important risk factor for accidents. The paper also suggests how the findings of this research can be applied to improve driver training, testing, and education. Education should be supplemented by tough enforcement measures and suitable engineering modifications to roads and vehicles.
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