A "big rig" is a term commonly used to describe large trucks, particularly those used for transporting goods over long distances. These vehicles typically consist of a powerful tractor unit and a trailer, which can carry heavy loads. Big rigs are essential for the logistics and transportation industry, helping to move products across cities and states. Big rigs are equipped with advanced features for safety and efficiency, including multiple axles, air brakes, and sometimes even GPS systems. They are often seen on highways and interstates, playing a crucial role in the supply chain by delivering everything from food to construction materials.