A NZ Study
https://www.sciencedirect.com/scienc...86111214601539 :
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Older drivers are frequently viewed as overly represented in crashes, particularly when crash involvement per distance travelled is considered. This perception has led to a call for tighter licensing conditions for older drivers, a policy which inevitably results in mobility restrictions for at least some drivers. However there is a growing body of research evidence which shows that as a group, older drivers represent no greater road risk than drivers from other age groups once different levels of driving activity are taken into account. This paper has examined aspects of older drivers' fitness to drive based on survey data and off-road and on-road driving performance from a sample of 905 New Zealand older drivers. The results show that policies which target all older drivers and lead to licensing and mobility restrictions cannot be justified from a safety basis.
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Nonetheless, I also concede that if you read the full report it does also conclude:
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The sample of New Zealand older drivers showed strong evidence that drivers who travelled low mileages were liable to have more crashes per distance driven than drivers with higher mileages. Older drivers travelling 20km or less per week had around ten times the per-distance crash rate of drivers travelling 200km or more per week. The analyses presented in this paper also showed that low mileage drivers were more likely to report a reduction in their driving performance and to report a range of health and medical conditions. Further, they also performed less well on two of the three off-road fitness to drive screening tests and the NZDORT on-road driving test (an external measure of driving skills).
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..so perhaps we should just encourage this older group to drive more to keep their skills up :-)
E