I think they should also take a test (mainly on their vision and reaction time) I've seen some elderly drivers who shouldn't be on the road and I've experienced them.

I'm sorry about your friend

And if they don't pass said test all access to vehicles should be taken away.
I saw an accident involving an old person. It was horrendous, the old guy's car was upside down and the innocent guy's was completely caved in - he died at the scene. The old guy got taken to hospital but also died. He had been going over 120kmph and was on the wrong side of the road.
He had alzheimers. He had alzheimers but he still had access to a car, that made me so angry.
30 seconds earlier and it would have been me and my family he ploughed in to.

I think everyone should have to take a driving test every 10-15 years or so. People tend to forget how to drive carefully.

My fiancee's sister was hit by an elderly driver. The woman had broadsided her at a busy intersection. The worst part? The woman said that she didn't even see the stoplight! Thankfully she was mostly ok, just banged up and bruised, but her car and everything in it (including her boyfriend's PS3) was destroyed.

We have such tests in our country at a certain age. I know my grandfather has to take one in a few months to see if he can drive after he got really sick, but he lost part of his eyesight and that's basically enough to make it impossible for him to pass. Not that his driving skills were bad. You could notice he got older but he saw possible danger far before me when I was in the passenger seat, so he was still pretty alert.

Thanks to that test we rarely see too old people on the streets. If we do, they seem to drive unusually slow xD But honestly I prefer too slow than way too hard and unsafe. So I will not complain in that case.
But yeah, now I think of it it's actually rare to see old people drive. Luckily many people are smart enough to say they cannot do it anymore or do not want to take the risk. My grandfathers best friend - 80 years old - hasn't been in her car for several years now. She doesn't trust herself enough. A good decision if you ask me.

I don't understand why these tests aren't put in everywhere. Like the example of Xroalia with the man who had Alzheimer. Of course it's hard to stop such a person from driving a car - hiding the keys and taking away the car is the only option since he'll forget constantly he may not drive.

Old people can be good or bad of course, but what is going to happen when an old person needs to get somewhere since cabs are expensive and a bus can't drop you off at your friends house if your friend lives far from any bus roads.
Maybe they can have for ever old couple 1 personal volenteer driver?

Legally speaking, once an elderly family member reaches a certain level of infirmaty the family can order the elderly person to have to take a driving test in order to continue to drive. But this usually only works when the family has power of attorney over the elderly person's affairs, trying to get it done otherwise is a loooooot of fighting.

I think we'd have a lot less of an elderly driving issue if there was more accessible public transportation, in the States at least. And public transportation that was more handicapped friendly. Buuuuut probably easier to legislate some yearly driving checkup for those over 70 than try to legislate decent public transportation. >__>