No one likes to lose their independence but it's inevitable to some extent as we grow older, and it's best to face it honestly. Jesus warned Peter, "When you were younger you dressed yourself and went where you wanted; but when you are old you will stretch out your hands, and someone else will dress you and lead you where you do not want to go" (John 21:18).
Does this mean the time has come for you to give up driving? Not necessarily but I hope you and your family will make this decision wisely and openly. They need to hear your concerns and you need to hear theirs. They may not realize the hardships this could cause you and you may not realize if your own abilities have declined. Several years ago, I gave up my own driver's license because I knew my own reactions weren't as quick as they once were.
One solution might be to limit your driving staying off busy highways, for instance, or not traveling long distances. Remember: You need to think about others also, and not just yourself. Don't wait until you have an accident to stop driving.
God does take care of us, even when we aren't aware of it but that doesn't excuse us from acting responsibly. Seek God's will in this matter and most of all, put your faith in Christ, and rejoice in the hope we have of heaven because of Him.