What a tough one. Our insurance agent very strongly advised us to not let Mom drive any more--turning 90 in july- just based on her age. Otherwise she's independant and living alone, with me a half hour away and available pretty much anytime. But I haven't had the guts to broach it with her yet. Now would be a good time as she's just come home from hosp/ rehab stay and hasn't driven for 2 months.
Taking away driving priviledges