My parents are in their 80's with poor health. Dad is blind. Mom just survived lung cancer. She has degenerative discs in neck and back so she has constant pain which she relies too heavily on pain meds.,! She sometimes drives under too much influence. They are at least 2 hours away from us kids.
Have you had a discussion with your mom about driving under influence? She may not realize. My mom was doing that, and my aunt too. They got in a traffic accident and were automatically at fault. Aunt was driving. Both are passed now, but aunt had to do community time, lost her license. No one was injured, but the cop persisted.
Good luck, it can be tough trying to get our parents to do what is best for them sometimes!