Focus Automotive

A University of Utah study, "A Comparison of the Cell Phone Driver and the Drunk Driver," found that "…the impairments associated with using a cell phone while driving can be as profound as those associated with driving while drunk." Furthermore, the impairment levels were similar whether the cell phones were used in handheld or hands-free mode.

And according to a May 2013 report from the National Safety Council, 25% of car crashes are likely caused by cell phone use. Drivers using cell phones fail to see up to 50% of the information in their environment.

Source: http://www.forcardrivers.com/facts.html