Should old people be banned from driving?

Banning old people from driving completely seems a little bit extreme. But what about people who can’t react in a timely manner, can’t make reasonable decisions, and can’t see or hear as well as other drivers? Allowing them on the road as freely as anybody else is as ridiculous as allowing drunk drivers on the road.

What to do? Like I said above, banning them all from the road completely is extreme, but allowing them all to drive is ridiculous. I propose that beginning at age 65 (maybe 70,) the driver takes a strict driving test every two or three years. Obviously this will keep the dangerous ones off the road, and the competent ones can still drive.

What are your opinions on this? Do you think all people over a certain age should be banned, or do you think everybody should have the right to drive? What age should we start requiring testing, and how frequent should the testing be?