How big is the problem? 
Copied from the CDC web site. 
•In 2012, 3,328 people were killed in crashes involving a distracted driver, compared to 3,360 in 2011. An additional, 421,000 people were injured in motor vehicle crashes involving a distracted driver in 2012, a 9% increase from the 387,000 people injured in 2011.1 
•In 2011, nearly one in five crashes (17%) in which someone was injured involved distracted driving.2 
•In December 2012, more than 171 billion text messages were sent or received in the US