The study done by a branch of the Insurance Institute for Highway Safety looked at crash data from four states with texting bans. It found that in three of the states California, Louisiana, Minnesota crashes actually increased.
Institute spokesman Russ Rader says the increase might be the result of drivers moving their phones down, of out public view, while they text and thus looking away from the road longer.
U.S. Secretary of Transportation Ray LaHood criticized the report as misleading. He says the bans are important in helping stop deaths from distracted driving, but states must enforce them and people must obey them.