Driving Safety

Hands-Free Calling Systems Potentially Distracting Drivers

With three out of four drivers believing that hands-free technology is safe to use, Americans may be surprised to learn that these popular new vehicle features may actually increase mental distraction, according to new research by the AAA Foundation for Traffic Safety.

The results, which build on the first phase of the Foundation’s research conducted last year, suggest that developers can improve the safety of their products by making them less complicated, more accurate and generally easier to use.

Using instrumented test vehicles, heart-rate monitors and other equipment designed to measure reaction times, Dr. David Strayer and researchers from the University of Utah evaluated and ranked common voice-activated interactions based on the level of cognitive distraction generated. The team used a five-category rating system, which they created in 2013, similar to that used for hurricanes. The results show:

  • The accuracy of voice recognition software significantly influences the rate of distraction. Systems with low accuracy and reliability generated a high level (category 3) of distraction.
  • Composing text messages and emails using in-vehicle technologies (category 3) was more distracting than using these systems to listen to messages (category 2).
  • The quality of the systems’ voice had no impact on distraction levels – listening to a natural or synthetic voice both rated as a category 2 level of distraction.

The study also separately assessed Apple’s Siri (version iOS 7) using insight obtained from Apple about Siri’s functionality at the time the research was conducted.  Researchers used the same metrics to measure a broader range of tasks including using social media, sending texts and updating calendars. The research uncovered that hands- and eyes-free use of Apple’s Siri generated a relatively high category 4 level of mental distraction.

To put all of this year’s findings in context, last year’s research revealed that listening to the radio rated as a category 1 distraction; talking on a hand-held or hands-free cell phone resulted in a category 2 distraction; and using an error-free speech-to-text system to listen to and compose emails or texts was a category 3 distraction.

To view the full report, “Measuring Cognitive Distraction in the Vehicle II: Assessing In-Vehicle Voice-based Interactive Technologies,” and other materials on distracted driving, visit NewsRoom.AAA.com. This study builds upon groundbreaking research conducted last year, which found that drivers can be dangerously distracted even if their eyes are on the road and their hands are on the wheel.

Read more: http://newsroom.aaa.com/2014/10/imperfect-hands-free-systems-causing-potentially-unsafe-driver-distractions/



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