Over time, many mobile devices, especially smartphones, have become an increasing threat to American motorists. The Governor's Highway Safety Association has researched about 350 scientific papers to measure driver attention while driving. The results can be somewhat shocking. Many different things keep drivers from finding their way, distracting them half the time. signal jammer can force the driver away from the phone while driving. Surprised? Although you can divert your attention away from food, drinking (alcohol of course), talking to passengers, makeup, music and other things, the most distracting currently known are mobile phones and smartphones.