PORTLAND, Ore. – Hands-free technologies might make it easier for drivers to text, talk on the phone, or even use Facebook while they drive, but new findings from the AAA Foundation for Traffic Safety show dangerous mental distractions exist even when drivers keep their hands on the wheel and their eyes on the road. This is the most comprehensive study of its kind to look at the mental distraction of drivers and arms AAA with evidence to appeal to the public to not use these voice-to-text features while their vehicle is in motion.
The research finds that as mental workload and distractions increase, reaction time slows, brain function is compromised, drivers scan the road less and miss visual cues, potentially resulting in drivers not seeing items right in front of them including stop signs and pedestrians.
With a predicted five-fold increase in infotainment systems in new vehicles by 2018, AAA is calling for action as result of this landmark research. “”Hands-free does not mean risk-free. There is a looming public safety crisis ahead with the future proliferation of these in-vehicle technologies,” says AAA Oregon/Idaho Public Affairs Director Marie Dodds. “AAA believes it’s time to consider limiting new and potentially dangerous mental distractions built into cars, particularly with the common public misperception that it’s safe to drive if your eyes are on the road and your hands are on the steering wheel.”
Cognitive distraction expert Dr. David Strayer and his research team at the University of Utah measured brainwaves, eye movement and other metrics to assess what happens to drivers’ mental workload when they attempt to do multiple things at once, building upon decades of research in the aerospace and automotive industries. The research included:
- Cameras mounted inside an instrumented car to track eye and head movement of drivers.
- A Detection-Response-Task device known as the “DRT” was used to record driver reaction time in response to triggers of red and green lights added to their field of vision.
- A special electroencephalographic (EEG)-configured skull cap was used to chart participants’ brain activity so that researchers could determine mental workload.
Using established research protocols borrowed from aviation psychology and a variety of performance metrics, drivers engaged in common tasks, from listening to an audio book or talking on the phone to listening and responding to voice-activated emails while behind the wheel.
Researchers used the results to rate the levels of mental distraction drivers experienced while performing each of the tasks. Similar to the Saffir-Simpson scale used for hurricanes, the levels of mental distraction are represented on a scale:
- Tasks such as listening to the radio ranked as a category “1” level of distraction or a minimal risk.
- Talking on a cell-phone, both handheld and hands-free, resulted in a “2” or a moderate risk.
- Listening and responding to in-vehicle, voice-activated email features increased mental workload and distraction levels of the drivers to a “3” rating or one of extensive risk.
“These findings reinforce previous research that hands-free is not risk-free,” says AAA Foundation President and CEO Peter Kissinger. “Increased mental workload and cognitive distractions can lead to a type of tunnel vision or inattention blindness where motorists don’t see potential hazards right in front of them.”
Based on this research, AAA urges the automotive and electronics industries to join us in exploring:
- Limiting use of voice-activated technology to core driving-related activities such as climate control, windshield wipers and cruise control, and to ensure these applications do not lead to increased safety risk due to mental distraction while the car is moving.
- Disabling certain functionalities of voice-to-text technologies such as using social media or interacting with e-mail and text messages so that they are inoperable while the vehicle is in motion.
- Educating vehicle owners and mobile device users about the responsible use and safety risks for in-vehicle hands-free technologies.
AAA also is using the findings to promote dialogue with policy makers, safety advocates and industry to ensure that these emerging in-vehicle technologies won’t lead to unintentional compromises in public safety. As part of this effort, AAA has already met with safety advocates and provided copies of the report to CEOs of all major U.S. automakers.
“This study constitutes the most in-depth analysis to date of mental distractions behind the wheel. AAA is hopeful that it will serve as a stepping stone toward working in collaboration with automakers to promote our shared goal of improving safety for all drivers,” adds Dodds. “Specifically, these increasingly common voice-driven, in-vehicle technologies should be limited to use for just core driving tasks unless the activity results in no significant driver distraction.”
AAA’s groundbreaking research on distracted driving was done by Dr. David Strayer (left) at the University of Utah.
Subjects were put in driving simulators and the first-of-its-kind instrumented vehicle.
Each participant in the study was fitted with a special EEG cap to measure brain activity so researchers could determine mental workload.
Participants were studied and engaged in various cognitive behaviors, from talking on cell phones to using voice activated technologies while driving.