According to one legal news source, over 500,000 trucking accidents occur every year in the United States. Approximately 5,000 of these truck accidents result in fatalities and even more result in serious injury or property damage. Many of these truck accident cases rely on evidence obtained from the commercial rigs themselves such as driver log books, which is a written or electronic log of the driver's time driving and resting, and black boxes. Black Boxes, also known as "electronic control modules" or "event data recorders" are electronic devices equipped in trucks that gather data about trip history and driver input. Additionally, if a commercial truck is involved in an accident, data about the crash is also recorded by the vehicle's black box.