I do find it difficult to understand how someone can go the wrong way down a slip road. I recall another elderly person doing this not too long ago for about a 3 mile stretch!
Many of you are saying that elderly people should re-take a test, these people have many years experience of driving, but there body and mind may not be up to the task of driving. But you can look at it the other way, that many young drivers do not have the maturity to drive! We may have better reflexes, but we do not have the experience that the older person may have.
There's no point going off that old people should be re-tested as sweet FA is going to happen, so why bother going on about it!
Live with it, there's awful drivers on the road from all walks of life, young, old, middle age, men, women.