I'm 65 and living in Florida half the year a Cape Cod the other half. Driving is a mess in both places, but it is not correct to assume that "old" people are a "mess" and are "constantly causing accidents". In Florida the accident rate goes up during "Spring Break" time to the tune of 4 X. Alcohol, drugs and distracted drivers are the primary reasons for the increase in accidents. Similarly on the Cape there is an increase in accidents in July and August. On the Cape it is my theory that we have a lot of "City folks" who are on their vacations and God help you if you get in their way. "City folk" tend to be inexperienced but aggressive drivers. Distracted drivers, alcohol, drugs also play a role. It is my experience (30 years volunteer EMT and CEVO instructor) that in both places age is somewhat down on the list of accident causation. All that having been said if you have ever had to have the conversation with an elderly loved one about taking away the keys to the car you know how difficult and complex a discussion that is. Call your Mom a mess and see how far that gets you.