Not only is it one of the biggest dangers, but it is also the most talked about danger. Whether you're watching a campaign against this phenomenon on television, walking past posters in the school hallway, or even watching the ad on your cell phone, warnings are everywhere you go. Even after all the different ads and posters, at any given time there are more than a million US motorists using their cell phones. But is using your cell phone behind the wheel really that dangerous (Keisbye 9)? The answer is yes. Cell phone users are four times more likely to get into a crash serious enough to injure themselves than drivers who don't use cell phones at all or use them in conjunction with a hands-free device