America's most dangerous jobs

Constantly striving to get packages and other shipments delivered to homes, stores and businesses on time is the goal for the nearly 1.3 million truck drivers that take to the streets each year.

Their pay often depends on volume: the more goods they move, the more they earn. Many work long hours and fatigue often plays a role in accidents. In fact, two-thirds of all driver fatalities involve highway crashes, according to OSHA.

Lamont Byrd, safety director for the Teamsters International (the union representing drivers) said safety has improved over the years by offering training in basic techniques like maintaining safe speeds and following distance.

But not everything that happens out on the road is under the driver's control. "Inattentive, distracted passenger car drivers are often times at fault," said Byrd.