Your post reminds me of my own father back in Australia, now deceased from a severe stroke at 68, 3 years after retiring. He had been a good driver all his life, never one accident, he taught me how to drive, driving behaviors, the rules of the road with excellent credible background to all the driving rules. On retirement he very suddenly changed his driving behaviors: Driving way too fast (city and country) plus suddenly speeding up way past any logical 'speed up' need. Driving way too close to the car / vehicle just in front. Ignoring the cars travelling in / appraoching intersections from all directions. and ignoring red lights, just keep going. In the middle of an intersection he would suddenly realize that he was in the middle of an intersection and jam his foot on the footbrake. My mum had never drven so she was to some extent oblivious to dad's new 'driving behavirs' and the danger they were both in. I refused to get in his car, always making excuses. I was trying to think of a way to take his car keys without causing him loss of face but also realizing that needed to be done very urgently. I tried 'you need to relax dad, tell me and I will drive you and mum anywhere you need to go'. He was horrified and told me so. Two days later he had a massive stroke in hissleep and died.