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Shut up and drive.
That's essentially the advice from the AAA Foundation for Traffic Safety after new findings Wednesday showed drivers face dangerous mental distractions even when they're using hands-free technology.
While hands-free devices might make it easier for drivers to text, talk or even use social media -- AAA reports increasing your mental workload can cause your brain and reaction times to slow.
"[Your brain] can only concentrate on one thing," said Ohio State Highway Patrol Sgt. Scott Bierer. “It might be quick switching to talking on the phone or looking at the stop sign or another vehicle, but it can only do one thing at a time."
Bierer said you don't have to be drunk to drive like you are.
“If you're on a cell phone and the conversation is outside the vehicle, your brain can't multi-task, so it's doing either one thing or the other,” he said. “When your brain is switching back and forth, that delayed reaction is equivalent to being impaired."
Despite the popularity of in-car entertainment devices, most drivers agree with AAA's safety issues.
West Chester resident Brady Heinrich said she narrowly avoided a wreck when another driver was texting and wasn’t looking where they were going.
"They didn't see me and almost went head on, so yeah, a lot of people are still texting and driving," Heinrich said. "It's become a real problem. People don't pay attention.”
AAA is calling the increase of in-car technology a looming public safety crisis.
The foundation is asking the tech industry to keep voice-activated functions limited to adjusting driving operations like climate control and windshield wipers -- not Facebook posts.
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