What science says about distracted driving

phone_drivingIn 2012, 3,328 people were killed, and an estimated 421,000 were injured, in motor vehicle crashes involving a distracted driver. As troubling as the numbers are now, the problem is only going to get worse, according to distracted driving researcher Paul Atchley. That’s because we put a high value on social information, and technology is expanding the types of non-driving, socially rewarding tasks we can do in our vehicles, he told attendees at the 2014 Toward Zero Deaths (TZD) conference. Atchley is a professor in the Department of Psychology at the University of Kansas and director of its cognitive psychology department.

According to Atchley, overwhelming evidence has shown that visual and cognitive distractions pose serious safety risks to drivers, yet industry and government regulations have only focused on manual and visual issues when it comes to distracted driving. “It’s not about your eyes, it’s about your brain,” he said.

Talking is one of the most difficult things the human brain does, he noted. Using techniques such as MRIs and EEGs, scientists can see that when a person is engaged in a visual task while driving in a simulator, and then begins engaging in a conversational task, “areas of the brain literally start to turn off.”

“Having your eyes open is not enough,” Atchley continued. “It’s not a controversy based on 40 years of research. We literally can’t do multiple things at the same time…and when it’s something like a conversation—which has social value and is incredibly important to us—that will take priority over the driving task.”

Paul Atchley

Paul Atchley

Systems in our brains are designed to give us chemical hits, in the form of dopamine and serotonin, to encourage us to do something over and over again, and social information is probably one of the things the brave craves most, Atchley explained. In a sense, our cell phones give us “drugs” every time we use them. “We may not be addicted to our phones, but we’re extremely compulsed by them.”

Consequently, simply telling people to put their phones down when driving is not a realistic proposition, he said.

For example, an overwhelming majority of college students have reported that texting and driving is far worse than drunk driving, yet most admit to texting while they drive, Atchley said. “Knowing does not necessarily change behavior.”

And because driving is a complex task for which you’re using a lot of your brain’s prefrontal cortex, you have no willpower left over to stop you from picking up your phone.

“The only really safe way to use a phone in a car is to not have a phone in the car with you, or to have it in a place you can’t access,” Atchley said.

So what could change behavior? Research has shown that laws—and enforcing them—are important, Atchley said. “We can change behavior with laws. And if we have the education to go along with it, people will start to change their attitudes as well.”

The Minnesota TZD conference provides a forum to share information on best practices in the areas of engineering, enforcement, education, and emergency medial and trauma services, and to identify new approaches for reducing the number of fatalities and life-changing injuries on Minnesota roads. The conference is offered by the Minnesota TZD Program and the Minnesota Departments of Public Safety, Transportation, and Health, with funding from the National Highway Traffic Safety Administration, and hosted by CTS.

Posted in Events, Safety

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