A birthday is a poor screening test. Federal traffic safety officials state the point directly, and families who use age as the trigger for a difficult conversation frequently target the wrong person while missing the driver who actually needs evaluation.
"Research shows that age is not the sole predictor of driving ability and safety," the National Highway Traffic Safety Administration says in its guidance on older drivers, while noting that our ability to drive safely is affected by physical and mental changes that occur as we age, in different ways and at different times.
Both halves of that statement matter. Millions of Americans drive safely into their eighties and beyond. At the same time, specific and measurable changes do raise risk, and those changes are what a family should be watching rather than the number on a license. The stakes are not trivial: NHTSA has reported that fatalities in crashes involving older drivers rose 42 percent in a decade, from 6,057 in 2013 to 8,572 in 2022, driven partly by slower reaction times and greater physical fragility in a crash.
The Four Changes That Actually Predict Risk
Vision is the first and most correctable. Contrast sensitivity and glare recovery decline before visual acuity does, which is why night driving and oncoming headlights often become difficult while a standard eye chart still reads fine. Peripheral vision loss from glaucoma can progress without a driver noticing, because the brain fills in the missing field.
Reaction time and the ability to divide attention are the second. The demand is not simple speed but the capacity to process several inputs at once, which is what an unprotected left turn across traffic requires. Complex intersections are where this shows up first, and NHTSA specifically advises planning routes that avoid unprotected left turns where possible.
Medications are the third and are routinely underestimated. Sedating antihistamines, benzodiazepines, opioids, sleep aids, muscle relaxants, some antidepressants, and certain blood pressure medications can impair alertness, coordination, or blood pressure regulation. Combinations matter more than any single drug, and a new prescription or dose change is a specific moment to ask about driving.
Early cognitive change is the fourth and most consequential. Getting lost on familiar routes, confusing the accelerator and brake, difficulty following directions, and increasing hesitancy at decisions are different from ordinary forgetfulness. A dementia diagnosis reframes the question entirely, since the issue becomes when driving must stop rather than whether.
Physical conditions belong alongside these, including limited neck rotation that prevents shoulder checks, reduced foot and ankle strength, arthritis affecting grip, and pain that distracts.
Observable Behaviors Worth Tracking
Families do better with specific observations than with impressions, and writing them down converts an argument into a conversation about evidence.
Concrete signals include new scrapes or dents on the car, mailbox, or garage; other drivers honking with increasing frequency; drifting between lanes; stopping in traffic for no clear reason; missing stop signs or signals; difficulty judging gaps when merging; and getting lost on routes the driver has used for years.
AAA has framed the underlying planning problem bluntly, stating that seniors outlive their ability to drive safely by an average of seven to 10 years and that families should plan for a driving retirement the way they plan for a financial one. AAA also recommends starting the conversation early rather than waiting for red flags such as crashes, scrapes on the car or a new medical diagnosis.
Self-restriction is worth noting too, though it cuts both ways. Many older drivers voluntarily avoid night driving, highways, rush hour, and bad weather, and that self-regulation is a sign of good judgment rather than decline. Avoidance that has become severe enough to cause isolation, however, is a problem in itself.
Near misses count as data even when no damage occurred. So does a passenger's instinct to brace. The AAA Foundation for Traffic Safety publishes a self-rating tool for older drivers that can structure that reflection, and it makes the same point NHTSA does: age should never be used as the sole indicator of driving ability.
The Formal Evaluation Most Families Do Not Know Exists
The step between family concern and surrendering a license is a professional driving evaluation, and it is underused.
A comprehensive driving evaluation is typically conducted by a driver rehabilitation specialist, frequently an occupational therapist with additional certification. It generally includes a clinical assessment of vision, cognition, reaction time, strength, and range of motion, followed by an on-road assessment in real traffic conditions.
The outcome is not binary. Evaluations frequently produce recommendations that keep a person driving safely, including vehicle adaptations, additional mirrors, seat and pedal adjustments, a course of training, or restrictions such as daytime-only or local-area driving. That range is the reason to seek an evaluation early rather than treating it as a last step before a license is revoked.
The American Occupational Therapy Association maintains a directory of driver rehabilitation specialists, and NHTSA's resource materials point families to that directory and to state licensing authorities that operate medical review processes. AAA and AARP offer self-assessment tools and driver safety courses, which are useful for reflection but are not equivalent to a clinical evaluation.
Approaching the Conversation Without Wrecking It
Driving is transportation, but it is also independence, identity, and access to medical care, groceries, and social contact. A conversation that ignores that will fail regardless of how sound the safety argument is. It is also worth remembering how much geography can raise the stakes, as MedicalDaily documented when a hospital closure made a two-mile ambulance ride grow far longer for a rural community.
The most productive opening is usually medical rather than family-related. A clinician can review medications, order a vision assessment, screen cognition, and make a referral for driving evaluation, and that pathway removes the adversarial framing that sinks kitchen-table confrontations.
Bringing the specific observations helps, as does starting from the goal of keeping the person driving safely for as long as possible rather than from the conclusion. Solving the transportation problem in advance matters more than most families expect. Identifying rides to medical appointments, grocery delivery, transit options, and paratransit services before raising the subject changes what is being proposed.
Some situations do not allow gradual approaches. Anyone who has had a crash caused by confusion, a loss of consciousness at the wheel, a seizure, or an episode of not knowing where they are should stop driving until a clinician evaluates them. States have medical reporting and review processes, and reporting requirements for clinicians vary by state.
This article is general information and is not a driving fitness assessment. Concerns about a specific driver should be directed to a clinician and, where appropriate, to a certified driver rehabilitation specialist.
Key Questions Answered
Is age itself a good predictor of crash risk? No. NHTSA states that age is not the sole predictor of driving ability and safety, while noting that age-related physical and mental changes affect driving in different ways at different times.
What actually predicts risk? Vision changes include contrast sensitivity and glare recovery, reaction time and divided attention, medication side effects, early cognitive change, and physical limitations such as restricted neck rotation.
Which medications matter? Sedating antihistamines, benzodiazepines, opioids, sleep aids, muscle relaxants, some antidepressants, and certain blood pressure medications. Combinations and recent dose changes deserve particular attention.
What behaviors should families watch for? New vehicle damage, drifting between lanes, missing signs or signals, difficulty merging, stopping without reason, frequent honking from other drivers, and getting lost on familiar routes.
What is a driving evaluation? A clinical and on-road assessment is usually performed by a driver rehabilitation specialist, often an occupational therapist with additional certification. Outcomes can include adaptations, training, or restrictions rather than cessation.
How should families raise the subject? Through a clinician, where possible, with specific written observations, framed around driving safely for longer, and with transportation alternatives identified in advance.
When must driving stop immediately? After a crash caused by confusion, a loss of consciousness at the wheel, a seizure, or an episode of disorientation, pending clinical evaluation.
