Dementia and Driving: Signs It's Time to Stop

Someone with dementia should stop driving once the condition starts affecting their judgement, reaction time or sense of direction, and for everyone with a progressive dementia that day eventually comes. Some people in the very early stage can still drive safely for a while, so the best guide is a formal driving evaluation plus close attention to warning signs, not the diagnosis alone.

Can someone with early dementia still drive?

Sometimes. Research on drivers with very mild dementia shows a wide range: some drive about as well as their peers, others are already unsafe. That's why guidelines from groups like the American Academy of Neurology recommend judging each person individually and re-checking regularly, often every six months.

What doesn't change is the direction. Alzheimer's and most other dementias are progressive. Driving needs fast decisions, divided attention and a good sense of space, and those are some of the skills dementia wears down. So it helps to treat driving as something with an end date you plan for, not a yes-or-no question you settle once.

What are the warning signs of unsafe driving?

These are the ones families most often notice first:

• Getting lost on routes they've driven for years
• New dents, scrapes on the car or the garage door
• Near misses, or passengers feeling nervous
• Confusing the brake and accelerator, or hesitating at junctions
• Missing stop signs or traffic lights
• Drifting between lanes, or driving much slower than the traffic around them
• Tickets or warnings from police
• Getting angry or flustered behind the wheel

One sign on its own may mean nothing. A cluster, or anything that gets worse over a few months, is a reason to act. If you only see them occasionally, ride along on a familiar route and pay attention to how they handle a left turn across traffic. That's often where problems show up.

How does a driving evaluation work?

Ask the doctor for a referral to a driver rehabilitation specialist, usually an occupational therapist with extra training. A typical evaluation has two parts. The first is in an office: vision, reaction time, memory and attention tests. The second is a drive on real roads in a car with a dual brake.

The result is useful because it comes from a neutral professional. "The evaluator said it isn't safe" lands very differently from "your daughter thinks you're a bad driver." Some evaluators can also recommend limits, like daytime only or no motorways, for people who are still borderline.

How do you talk to a parent about giving up the keys?

Start before there's a crisis. A conversation soon after diagnosis, while the person can still take part in planning, goes far better than one after a crash.

A few things that tend to help:

• Lead with safety and with what they care about. "I don't want you to hurt yourself or a child" works better than a list of their mistakes.
• Bring in the doctor. Many people accept the message more easily from a doctor.
• Have the transport plan ready. Losing the car often means losing independence and friends. Line up lifts, a ride-hailing app set up on their phone, community transport, or a weekly standing outing.
• Expect to have the conversation more than once.

If the person can no longer understand the risk, you may need to take more direct steps: the doctor reporting to the licensing agency, keeping keys out of sight, or selling the car. It's hard, and it often feels like a betrayal. It isn't one.

Can technology help with the transition?

Some. A GPS tracker in the car can show whether they're getting lost on routine trips, which gives you facts to discuss rather than worries. Our guide to GPS trackers and wandering covers how to do that with consent and dignity. Ride-hailing apps and video calls can soften the social loss, and our piece on technology and loneliness has ideas there.

Don't count on driver-assist features to buy more time. Automatic braking can prevent some fender-benders, but it can't stop someone from getting lost forty miles from home.

Finally, add driving to the planning you do after diagnosis. Our list of documents to prepare after a dementia diagnosis is a good place to write down what everyone agreed, including when the keys get handed over.