A recent study from Carnegie Mellon University and the London School of Economics and Political Science shows no increase in the number of crashes and fatal crashes involving drivers with cell phones when phone usage spikes. The researchers used cell phone data from 2002 through 2005.

Chris Cochrane with the California Office of Traffic Safety stands behind California ban on using cells behind the wheel.

They looked at data from two years before and after the ban. He says they have looked at crash statistics for the two years before and after the state ban went into affect. 

He says overall traffics deaths declined 22 percent, while handheld cell phone driver deaths went down 47 percent after the ban.

Cell Phone Study