She cited a study from the Harvard Center of Risk Analysis that found cell phone use while driving accounts for about 6 percent of crashes each year nationwide. That's 636,000 crashes, 330,000 injuries, 12,000 serious injuries and 2,600 deaths, she said.
Another Harvard study put the cost of cell phone-related crashes at about $43 billion a year.
A 1997 study in the New England Journal of Medicine and a report by the Insurance Institute for Highway Safety in 2005 found drivers who use cell phones while driving were four times more likely to be in a crash.
Hands-free devices may also cause a hazard, Froetscher added. A study by researchers at the University of Utah found no difference in driver concentration between using hand-held or hands-free devices. In fact, talking to a passenger while driving is much safer than talking on a cell phone, the Utah researchers noted.
In addition, a Virginia Tech study found that 80 percent of crashes result from driver inattention.