I went through this with a family member years ago. Let the doctor do all of the talking. If it comes from the doctor (I spoke with the doctor on the phone about the family member's response time on the road being so much slower) they realize it must be the right thing to do then. We were all concerned for their well being and others on the road as their judgement was not what it use to be. When the doctor told them, they were angry, but, eventually accepted it and we took turns taking them to their appts., running errands, etc., I gently told them on the way home from the appointment, "You don't want to have an accident and hurt yourself or someone else do you?" They said, "No". They went through some depression with this. That is a very hard thing to go through. You are giving up much independence when you can no longer drive. Keep encouraging him that you are there for him and can take him to the gym or wherever he needs to go. I'm so sorry. Praying for you and your husband. Hugs....