My husband with LBD still provides me with turn-by-turn driving instructions - punctuated with “stop”, “go”, “yield”, etc. I can’t even describe for angry & frustrated that made me at first! Now I view it as a positive - he knows where we are & where we are going. And he still recognizes traffic signs. So it’s a good gauge of his lucidity. The challenge is to never accept what he says without first checking for myself - especially at an intersection! In some small way, tolerating his driving guidance validates & makes him feel useful.