I'm so glad you drew our attention to driver safety. Early in my wife's journey with Alzheimer's Disease, when she had been diagnosed with mild cognitive impairment, she was driving us home and couldn't remember how to get there when she was only a mile away from our home of 45 years. Another time her mother was visiting us and wanted to do an errand so we gave her the keys to our car. About a half hour later she phoned us and said she was lost. She told me about some things she could see nearby so we were able to find her and help her get back safely.

Now, at age 81, I am very focused on my own driver safety. I'm aware of many of my own changes in vision, hearing, reflexes, and attention. For decades I have made good use of the AARP safe driving courses. I retake the course about every 3 years and learn something new to focus on every time. Then I find myself reminding myself as I'm driving "You are too close to the car ahead, back away." "Slow down, you're reflexes aren't as good as they used to be." "Be careful pulling into the intersection. The most frequent cause of accidents by older drivers is when they fail to yield the right-of-way. You might misjudge how fast the oncoming traffic is going." Etc.

I don't drive at night unless absolutely necessary. I limit my driving during the day to times when traffic volume is low. I really focus on paying attention when I'm driving, acting like I'm taking a driver's test with an examiner in the passenger seat. I'm starting to use Uber more often.

I highly recommend the AARP or other safe driving courses. Here's a website to check out. That reminds me, it's time for me to sign up again!
https://www.aarpdriversafety.org/why-take-our-course.html