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The top 5% distracted drivers of commercial vehicles are distracted 79% of the time during risky driving maneuver. That's nearly six times more often than the rest of the drivers, according to the initial results of the SmartDrive Distracted Driving Index study, which explores the distracted driving rate of commercial fleets.

Tags: Safety, Distracted driving, SmartDrive

Most serious traffic accidents occur when drivers are making a left-hand turn at a busy intersection. When those drivers are also talking on a hands-free cell phone, "that could be the most dangerous thing they ever do on the road," said Dr. Tom Schweizer, a researcher at St. Michael's Hospital in Toronto.

Tags: Distracted driving