Another option is to ask the senior to take a class like this one. That is what I suggested to my mom, after being hospitalized for over a month, I told her I thought she might need a “refresher” class. She agreed but somehow never wanted to take it when I asked. I think she knew she would not do well.
https://www.thedefensivedrivingacademy.com/Senior_Programs.html
Here is another program that I considered: https://www.mossrehab.com/driving