Older drivers may not be the most at risk age group with respect to intersection crashes. A study by Bladock et al. studied crashes in New Zealand and Australia comparing drivers between 0-59, 60-74, and 75+.

The study showed that for the majority of jurisdictions, drivers aged 75+ had a lower crash rate per head of population than those under 60, for intersection-type crashes.

For more information, see the full study at:
https://acrs.org.au/files/papers/arsc/2018/JACRS-D-18-00130-Baldock.pdf