Even when they're not texting, just talking on the phone puts pedestrians at risk.
PROBLEM: Because people absorbed in a conversation have trouble paying attention to anything else, we're beginning to realize that even hands-free devices don't make driving while talking on the phone much safer. But even though they have less to pay attention to, "inattention blindness" can strike pedestrians, too. In just one example, people who were using their cell phones while walking "were less likely to notice a clown on a unicycle" that passed by. One in three people don't put their phones down even to cross a busy street.
METHODOLOGY: Ohio State University researchers Jack Nasar and Derek Troyer collected information on cell-phone related emergency room visits from the National Electronic Injury Surveillance System (the same database that brought us "The Top Ways We Injure Our Genitals"). They looked at all injuries for pedestrians, bicyclists, and motor vehicle drivers between 2004 and 2010.
For the rest of the story: http://www.theatlantic.com/health/archive/2013/06/study-distracted-walking-causes-more-injuries-than-distracted-driving/277032/