In three of the states, there have been more crashes since the implementation of the law.
A spokesman for the institute said the increase in crashes could be because drivers have their phones down out of public view, so their eyes are off the road for even longer than before.
/*U.S. Secretary of Transportation Ray LaHood*/ said the report is misleading.
He said the bans are important, but they have to be enforced and obeyed.
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