We went through nightmares to stop my mil from driving. She had three wrecks (fortunately, never hit anybody else -- just immovable objects) by stepping on the accelerator instead of the brake. The last time, she drove through the back of her house and did thousands of dollars worth of damage to her house AND her car.
State Farm refused to pull her insurance.
The State of Texas can't do anything unless a doctor says a person is medically incapable of driving. She was under a hematologist's care who said she couldn't write the letter because her anemia was under control and thus wasn't contributory to her driving. Her internist wouldn't write the letter. Fortunately, her cardiologist took it upon himself to write it -- after my mother-in-law giggled and told him she was still driving, and he couldn't do anything to stop her.
That didn't end the nightmare, though.
In Texas it is next to impossible to stop the elderly from driving unless they are reasonable enough to recognize when it's no longer safe. My mother only drives short distances even though she's never had a wreck. She is uncomfortable on the freeways and always gets somebody else to take her if she's going far.
There HAS to be a way to stop bad drivers of any age.
I think teenagers are allowed to drive too young. I think that should change. HOWEVER, the big difference between teenagers and the elderly is the asumption that teenagers will improve. The elderly almost without exception will not, and their driving abilities will diminish. This is a fact of life and there needs to be a legal way to deal with it.
After my mil drove through the back of her house (making excuses as to why it wasn't her fault, of course) and my husband took her keys away, it turned out she'd hidden extra keys all around her house in anticipation of such a day. She kept driving. People kept telling us all the things we should say to her, but the problem was, we'd said all those things.
When my husband said, "What if there had been a child in front of your car? What if you killed somebody?" she responded, "So be it."
How do you deal with that?