But it's important not to urge a family member to stop driving until you're convinced he's dangerous behind the wheel. Experts agree that age alone is not a predictor for poor driving skills. And older drivers actually cause fewer motorist and pedestrian deaths than drivers of any other age group, according to John Eberhard, the head of the National Highway Traffic Safety Administration's Older Driver Research Program. Eberhard also gives seniors high marks for driving safety: They're more likely than other drivers to wear seat belts, for example, and less likely to drink and drive. In addition, seniors drive much less than younger drivers, so the total number of accidents is lower.

How can you tell when the time has come for someone to stop driving? Caring.com has developed guidelines that will help you avoid being an alarmist, while also realizing when the time has arrived that driving is no longer a safe activity for the person in your care.