Tractor trailers are considered to be the backbone of the United States commercial industry. Without them on the road, manufacturing and shipping numbers would decline dramatically. They transport goods from point to point across the country all hours of the day.

Tractor trailers usually consist of three axles. The front axle has two wheels and the two rear axles each have two wheels, also known as “dualies.” The various types of tractor trailers include box trucks, a bus truck, a tanker, dry bulk, car hauler, lowboy trailers and a flatbed. Box trucks are predominantly used to ship small loads of goods; usually produce from a farm to a local supermarket or farm stand.

A dry bulk truck is used to transport non-perishable goods like clothing and any other dry objects. A tanker is used to transport fuel from a fuel source to gas stations, airports and refineries. They are long and round and sit on axles just like regular tractor trailers. One of the most recognizable and popular tractor trailers on the roadways today is the car hauler, a truck that transports cars from an airport to a car dealership. They consist of two different levels filled with diverse types of cars.