This reminds me of my late grandpa, who lost his license at the age of 77. His memory was deteriorating and he wasn't paying very much attention to the road. Occasionally, he would lose track and run through a stop sign. He mostly drove in the rural town where he lived, so luckily, he never got in an accident. He definitely wasn't a happy camper and didn't like the feeling of having my grandma becoming his driver. One time I was visiting them, grandma let me ride my bike over to the post office (which was only a few blocks away) to get their mail. My grandpa (who had just lost his license) got in the car and drove off without telling anybody. On the way back from the post office, I found myself being followed by him. Despite my attempts in telling him to go home and assuring that I'd be fine, he just kept following along the road. All he wanted to do was make sure that I'd make it back safetly. This was on a road with a 45mph speed limit, and we were both going 15. I was definitely more worried about him than he was of me.