In this photo taken Sept. 24, 2012, Lee Sneller, left, follows his wife Pat Sneller to their car so Pat can drive him to an appointment in Flower Mound, Texas. Families may have to watch for dings in the car and plead with an older driver to give up the keys _ but there's new evidence that doctors could become more of an influence on one of the most wrenching decisions facing a rapidly aging population. A large study from Canada found that when doctors warn patients, and driving authorities, that they may be medically unfit to be on the road, there's a drop in serious crash injuries among those drivers. The study, in Thursday's New England Journal of Medicine, couldn't tell if the improvement was because those patients drove less, or drove more carefully once the doctor pointed out the risk. (AP Photo/LM Otero)
