Prince Philip's road mishap begs the question: At what age to stop driving?

Prince Philip, 97, was involved in a car accident outside London

Prince Philip, the 97-year-old husband of Queen Elizabeth II of Britain, overturned his Land Rover on Thursday in a car crash on a rural road north of London. He was unhurt; two women in an oncoming minivan suffered scrapes and a broken wrist.

It’s not known exactly what happened or who was at fault. The prince told police officers at the scene that he was momentarily blinded by the sun while pulling onto a main thoroughfare.

The incident has prompted some reflection in Britain about when an aging driver ought to consider surrendering the car keys. Sound familiar? The question has long