This afternoon I saw aa classic example of why older drivers should do cognitive tests.
I was in an underground car park getting to leave when I heard a car constantly revving a bit and then moving down th aisle very slowly and then when the momentum of each litttle rev died away and it almost came toa stop, doing another little rev, so it was travelling in slow spirts. It was a huge black executive type. saloon car, with all its lights on full despite the car park being well lit with daylight coming in around the edges.
It drifted past me, and then found a space in the row backing onto mine, to his credit the driver backed in, but only 75% of the way and stopped the car with quite a bit of it sticking out into the aisle and about six foot of empty space at the back.. He then sat there for several minutes with all the lights full on, including break lights.
I was wanting to pull out through the empty space next to his, so waited in case he moved again then as I slowly pulled out, he finally turned his light off and got out of the car.. He was a very old looking and frail man and I did wonder how safe he was on the roads, especially in a busy University town with two big universities and students and bikes everywhere and a busy hospital with emergency ambulances passing buy every few minutes.
Before my aunt's dementia was diagnosed I can remember a neighbour describing her driving to and from the local town 5 miles away at 20 miles an hour in second gear.