JUST ONE OF THE REASONS THEY SHOULDN'T BE LICENSED:

Elderly half as likely to see pedestrians (UPI, 3/07/11)

Elderly drivers are half as likely as others to see pedestrians on the sidewalk due to a limited field of view, researchers in Israel suggest.

Researchers at Ben-Gurion University of the Negev studied reaction times and perception of pedestrians as hazards, comparing experienced elderly and non-elderly drivers.