response: Well, for the United States, the speed limits depends on the jurisdiction. Western and Eastern United States speeds may be different.
original_response: I don't know if it is dangerous. I just thought they had long hours and often fell asleep at the wheel. I do know that trucks go faster than they should on the road.
history: I've always wondered what it is like to be a truck driver.  My father was one. Well being a truck driver means earning a living while driving a truck. The trucks can be a semi, box or dump truck. Did you know the term is also varied in and between countries? Places like the U.S. call them truckers or teamsters but those in Australia would refer to them as a truckie. People in Ireland and India would call them a driver or a lorry driver. No, I don't think I've heard the Australian or Irish terms. I wonder if they can drive the same speed throughout the roads.
knowledge: Speed limits in the United States vary depending on jurisdiction, with common in the Western United States and common in the Eastern United States.