A newly released study in the Journal of Adolescent Health points to loud teen passengers as one of the most dangerous factors leading to crashes among newly licensed teen drivers. The study, conducted by the University of North Carolina Highway Safety Research Center, used video cameras to record driving situations allowing them to measure distracting events more reliably. Unlike events that the driver can control, such as texting and phone use, the loud and rowdy behavior of passengers is an uncontrollable factor that can be an even greater distraction for new teen drivers. Read more: New Study Identifies Loud Conversations Among Passengers as the Most Likely Distraction for Newly Licensed Adolescent Drivers