When should an older driver stop driving?

By Robert H. Shmerling, M.D.
Posted on May 15, 2024

When my grandmother repeatedly clipped the mailbox backing out of her driveway, she always had a ready explanation: “The sun was in my eyes,” or “Your grandfather distracted me.”

Our family knew we needed to take action. But no one wanted to be the one to ask her to stop driving. She was fiercely independent, didn’t agree that her driving was a problem, and didn’t appreciate our concerns.

Maybe a similar story is unfolding in your family — or maybe you’re starting to wonder about your own skills.

This article, part one of a two-part series, aims to help people understand the red flags to watch for and why driving abilities change as people age. It also describes a few ways to improve impaired driving and challenges to navigate.

A second article will address ways to strike a balance that respects dignity — and safety — while providing action plans for older drivers and their families.

How safe are older drivers?

Unsafe drivers can be of any age, particularly when drinking is involved. But fatal traffic accidents have risen in both young drivers and older drivers, according to data from the National Safety Council:

Fatalities occurring in crashes involving drivers ages 15 to 20 rose nearly 10% between 2020 and 2021, accounting for 5,565 deaths.
Among drivers 65 or older, fatalities rose 15% between 2020 and 2021, accounting for more than 8,200 deaths.

While younger drivers may be inexperienced or more likely to be distracted or reckless, older drivers often overestimate their driving abilities. That may be one reason many unsafe older drivers continue to drive despite failing driving skills.

According to the Insurance Institute for Highway Safety, the rate of motor vehicle accidents per mile driven is higher for drivers ages 80 and older than for almost every other age group. Only the youngest drivers have higher rates.

And the rate of fatal motor vehicle accidents per mile driven is higher for drivers aged 85 and older than for every other age group.

These statistics reflect the reality that an older driver may not be the only one injured or killed in a crash — occupants in one or more vehicles may be, too. And then there are pedestrians and cyclists at risk.

The stakes are high when any unsafe driver is on the road. For older drivers with waning driving skills, it’s important to recognize the problem and understand why it’s happening.

Watch for red flags

As people get older, driving skills may decline so slowly that it’s not obvious that worrisome changes are happening.

Even when mishaps and near-misses occur, there are so many possible contributors — especially other drivers — that it may not be clear that the older driver was at fault.

Red flags that might mean an older person is an unsafe driver include:

concerned comments from family or friends
reluctance of others to ride with them
input from other drivers (“Why is everyone honking at me?”) or traffic authorities (“Why am I getting all these traffic tickets?”)
getting lost on familiar roads
consistently driving too slowly or too fast
unexplained dents or scratches appearing on the car
frequent accidents or near-misses.

Driving skills can wane with age

While people of advanced age can safely drive (and many do!), driving skills may wane due to:

medical conditions, such as arthritis, neuropathy or dementia
medications, such as sedatives or certain antidepressants
age-related changes in reaction time
trouble with vision or hearing
other physical changes related to aging, such as less flexibility or strength
difficulty processing rapidly changing information. For example, an older driver may be more likely than a younger driver to accidentally press the gas pedal instead of the brake when needing to stop suddenly.

What steps may improve driving?

Some changes that impair driving can be reversed, or a workaround can be found.

For example, if driving is impaired due to cataracts, cataract surgery can restore vision and improve driving. If night driving is difficult, it’s best to drive only during the day. If memory problems are starting to arise, it may still be possible to drive safely in more limited circumstances.

Driving problems due to advanced dementia or a major stroke affecting judgment and physical skills are much less likely to improve.

Conversations are challenging

If there is no simple way to reverse or work around declining driving skills, accept that there will be many challenges to navigate, whether you’re the older driver or a family member.

It’s not easy for older drivers to acknowledge declining function. Driving impairment is an unsettling milestone, an indication that the future may include further loss of independence and abilities.

After all, most older folks facing a decision about whether it’s safe to continue driving were good drivers not so long ago. They may still see themselves as competent drivers and see efforts to restrict their driving as overly cautious or demeaning.

Even when all the signs are there, it may be tempting for a poor driver to deflect blame to other drivers.

Often, the older driver doesn’t share their family’s concerns about driving safety. This can lead to arguments, confrontation and resentment.

However, the safety of others is at stake. The older driver with waning skills may endanger many people besides themselves: passengers in their care, other drivers and their passengers, cyclists and pedestrians.

It’s hard to know when the time is right. Speaking up too soon may lead to unnecessary restrictions on a loved one’s favored means of transportation, not to mention family strife. Waiting too long can lead to avoidable tragedy.

Finding a path forward

As for my grandmother, none of us knew what to say. Should we try to get her to agree to stop driving entirely or let her ease into the idea over time? Should we bring it to the attention of her doctor? Or should we take an even harder step and report her to the authorities?

If you’re asking similar questions — or if you’re starting to wonder about your own driving abilities — you may feel strongly that it’s important to respect individual preferences, dignity and independence. Yet you also want to protect everyone from harm.

What are the best ways to strike a balance? Can you test and improve how an older driver is doing behind the wheel? Can you navigate tough conversations in ways that allow room for both independence and safety? The next column will tackle these subjects.

Robert H. Shmerling, M.D., is a senior faculty editor and an Editorial Advisory Board member for Harvard Health Publishing.