The U.S. Labor Department indicates that one out of six American workers killed on the job is a tractor-trailer truck driver, and these drivers face an increased risk of injuries, illnesses, and fatalities. Of the tractor-trailer drivers licensed, 761 were killed in 2014, and data shows that driver fatalities have increased annually between 2009 and 2014. Heavy or tractor-trailer truck drivers are three times more likely than other U.S. workers to sustain an injury or illness requiring days away from work. Approximately half of all truck drivers needed at least 20 days away from work to recover from an incident; 42 percent of tractor-trailer drivers required at least 31 days. Injuries from slips, trips, and falls were the most common cause of missed workdays, followed by overexertion injuries caused by tasks such as loading and unloading cargo, pushing and pulling containers, and entering and exiting the vehicle. "We hope that this kind of detailed information will help employers improve conditions for tractor-trailer drivers, as well as empower workers with knowledge about the hazards they're likely to encounter," said the department.