Here in Norfolk UK, the population in 2017 was nearly 900,000. And the number of people over 65 was about 200,000. (ONS data) As Norfolk is a largely rural county, people often live in villages where bus services aren't terribly good or even non-existent (as in our village). Without a car, these folk would be stuck.

However, we constantly come across rather bad driving among the elderly. Drifting about, suddenly turning off without indicating, pulling out from side-roads without looking, going far too slowly etc.

At the supermarket, we see extremely old/disabled/incapacitated people hardly able to open the door of their car, getting behind the wheel and driving off, and to us it seems as if they should never have had their licence renewed (as one must after the age of seventy)

In our village we have Dougie, who is now 100 years old. He still drives (to my mind quite capably) but what are his reactions like? Has he adapted to modern road conditions? Could he have a collapse while driving?

I let my husband do most of the driving nowadays. He's a bit younger than me and very, very safe/on the ball. When he gets doddery though, we'll bite the bullet. There's a special old folks' bus once a week here, to a nearby small town, which gives you two hours to shop, then heads back. A bit restrictive, but the only solution.