Real-world risk exposure in older drivers with cognitive and visual dysfunction

Area of Science:

• Gerontology
• Transportation Safety
• Neuroscience

Background:

• Older drivers face risks from age-related cognitive and visual decline, potentially impacting mobility and crash risk.
• Assessing real-world driving behavior and its relationship to functional abilities is crucial for understanding and mitigating risk.

Purpose of the Study:

• To objectively measure and monitor real-world driver safety behavior in at-risk older adults with age-related dysfunction.
• To analyze the relationship between cognitive/visual function, driving patterns, and environmental context.

Main Methods:

• Passive monitoring systems collected real-world driving data from 77 older adults over 242,153 km.
• Driver behavior (steering, braking, accelerating) was analyzed in relation to cognitive/visual abilities and environmental factors (road type, visibility).

Main Results:

• Cognitive dysfunction correlated with erratic braking, accelerating, and steering, particularly on commercial/interstate roads.
• Visual dysfunction impacted braking/accelerating at night and on interstates, but not steering or on residential/commercial roads.
• Drivers with dysfunction did not reduce driving in higher-risk environments; visually impaired drivers increased interstate driving.

Conclusions:

• Cognitive and visual profiles map to real-world driving behavior and risk areas.
• Age-related dysfunction directly impacts vehicle control, and drivers may not self-regulate exposure to risky conditions.
• Naturalistic observation can aid early risk detection, fitness-to-drive assessments, and interventions for aging drivers.