A National Highway Traffic Safety Administration study released in April found that at any given daylight moment in the United States, 660,000drivers are using phones or other electronic devices.
NHTSA says motor vehicle crashes remain the leading cause of death for people ages 5 to 33. The agency's data showed that 3,331 people died in distracted-driving accidents in 2011, up from 3,092in 2010. Another 387,000 people were injured in 2011 in crashes with a distracted driver. Detailed data for 2012 are not yet available.
Last month, NHTSA issued final voluntary safety guidelines that call for certain in-vehicle functions such as manual texting, Web browsing and video phoning while driving to be disabled while the vehicle is moving.