My dad is 82, and like many in his generation, suffers the curse of the industrious man- he will continue to perform physical feats for which he assumes capability until he injures himself (and possibly others). Driving is just one of these things.

So far, he has gotten operations on his hips, hands, shoulders, and back after overexerting himself while gardening, moving furniture, and... walking. When I ask him to consider the risks of driving, he brushes me off like I'm being ridiculous. It infuriates me. There's no arguing with him. And I'm absolutely gonna get a phone call one day that I'm not gonna like.