The Driving Conversation

My [Relationship] [Initials] has [Their Diagnosis] and should probably stop driving. What I've noticed: [What You've Noticed]. How they'll react: [How They'll React]. What driving means to them: [What it means]. Help me: 1) tell me honestly whether what I described sounds like 'now' or 'soon', and what an objective assessment looks like (a doctor's evaluation, a driving evaluation) so it isn't just me deciding, 2) write an opening for the conversation that starts with what they'd lose, not what I'm worried about, 3) give me three responses for when they get angry, deny it, or say 'I've been driving for 60 years', 4) tell me what to put in place BEFORE the conversation so 'how will I get anywhere?' already has an answer, 5) tell me the options if they refuse — involving the doctor, the DMV, the car itself — from gentlest to firmest, and be honest that some of these will hurt. Not legal advice.