Like the rest of the United States, the population in Michigan is getting older Michigan has one of the oldest populations in the country, with 14 percent of the residents being age 65 or older, according to the 2010 census This age group is the fastest growing segment of the population in Michigan.  See this link for Older Driver Michigan Guide:

Changes in Driving Behavior 

Family members or caregivers need to be aware of potential problems affecting safe driving when the older adult: 

Is forgetful or confused
Uses bad judgment when driving
Fails to follow the rules of the road
Cannot see where they are going.
Exhibits aggressive driving.
Drives well below the speed limit
Experiences multiple traffic crashes (dents or dings on the car)

 Neighbors, friends, or others indicate there is a problem