As people live longer and stay healthier later in life, more older adults are continuing to drive well into their 70s and 80s. In the United States alone, more than 50 million licensed drivers are now age 65 or older.
Florida has one of the largest populations of older drivers, with around 5 million seniors still driving regularly.
For many older adults, driving represents freedom, independence, and connection to daily life. Being able to drive allows people to shop, visit friends and family, attend medical appointments, and stay socially active.
Because driving is so important to quality of life, researchers are increasingly interested in understanding how aging and brain health affect driving ability.
A new study from Florida Atlantic University suggests that subtle changes in everyday driving may provide an early warning sign of cognitive decline long before more obvious symptoms appear.
The findings were published in the journal Sensors.
Researchers focused on two very early stages of cognitive decline called pre-mild cognitive impairment, often shortened to pre-MCI, and mild cognitive impairment, known as MCI.
These conditions involve small but noticeable problems with memory, thinking, attention, or decision-making that are greater than normal aging but not severe enough to be classified as dementia.
People with MCI may occasionally forget appointments, lose track of conversations, or struggle with complex tasks more than before. However, many individuals continue to function independently in daily life.
Scientists have been searching for better ways to identify these early brain changes because treatment and lifestyle changes may work better when problems are detected earlier.
Traditional testing usually relies on memory exams, questionnaires, and clinical evaluations. However, researchers now believe that daily activities such as driving may quietly reveal early changes in brain function before people or family members notice major symptoms.
Driving is actually a very complex mental activity. A driver must constantly pay attention, react to traffic, judge speed and distance, make quick decisions, and coordinate hand and foot movements. Even small changes in brain function may subtly affect these abilities.
To explore this idea, researchers at Florida Atlantic University designed a long-term study using in-car sensors to monitor how older adults drove in their normal daily lives.
The research team installed compact sensor systems inside participants’ vehicles. These systems were designed by engineers from the FAU College of Engineering and Computer Science using commercially available technology to keep costs low and reduce complexity.
The equipment quietly recorded driving information without interfering with the drivers. The system collected telematics data and video information while participants used their cars normally over a period of three years.
Researchers analyzed nearly 4,800 individual driving trips.
Each trip provided detailed information about how the person drove. The system measured trip length, driving time, average speed, maximum speed, fuel level, gas pedal use, engine performance, and driving events such as hard braking, sudden acceleration, or sharp turns.
At the same time, participants also completed detailed cognitive testing every three months during the study period. This allowed researchers to compare driving behavior with changes in memory and thinking abilities over time.
The researchers found that drivers with pre-MCI or MCI showed subtle but measurable differences in their driving patterns compared with cognitively healthy older adults.
One important difference involved how consistently drivers controlled the gas pedal. Drivers with early cognitive decline tended to use the accelerator less smoothly and less steadily.
They also took shorter and more fragmented trips and showed signs of less efficient speed control while driving.
In contrast, cognitively healthy drivers generally maintained steadier accelerator control, drove at more consistent speeds, and appeared more confident and responsive on the road.
Interestingly, the researchers found that no single driving behavior alone was enough to clearly identify cognitive decline. Instead, it was the combination of many small driving changes that created a recognizable pattern.
When researchers analyzed all the driving behaviors together, the system became highly accurate at distinguishing drivers with early cognitive impairment from cognitively healthy drivers.
The study’s senior author, Dr. Ruth Tappen of FAU’s Christine E. Lynn College of Nursing and the FAU Stiles-Nicholson Brain Institute, said the findings are especially exciting because they suggest that passive monitoring of daily driving habits could someday help detect cognitive decline earlier than current methods.
Unlike formal medical testing, driving data can be collected continuously in real-world situations without requiring patients to visit a clinic or complete difficult tests.
Researchers believe this approach could eventually become a valuable tool for identifying people who may need further cognitive evaluation.
The findings are important because dementia and Alzheimer’s disease often develop slowly over many years. Many people experience subtle brain changes long before receiving a diagnosis.
Early detection may give patients and families more time to plan treatment, adjust lifestyles, and explore ways to slow cognitive decline.
The researchers emphasized that the study does not mean older adults with slight driving changes are unsafe drivers or automatically developing dementia. Many factors can influence driving behavior, including physical health, stress, medications, sleep quality, vision problems, and road conditions.
However, the results suggest that everyday activities may reveal much more about brain health than previously understood.
The study also highlights the growing role of technology in health care. Modern sensors, artificial intelligence, and data analysis tools are increasingly being used to identify early signs of disease in ways that are less invasive and more practical for everyday life.
Looking closely at the study, one of its major strengths is the long-term collection of real-world driving data combined with regular cognitive testing. Many earlier studies relied only on short driving simulations or self-reported driving habits.
Still, researchers say more studies involving larger and more diverse populations are needed before this technology could be widely used in medical care.
Future research may also examine whether certain driving patterns are linked more strongly to Alzheimer’s disease or other forms of dementia.
Even so, the findings provide another reminder that the brain often gives subtle warning signs long before serious symptoms become obvious. Everyday behaviors such as driving may eventually help doctors identify cognitive decline earlier and help older adults stay safer and healthier for longer.
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Source: Florida Atlantic University.
