What does the term "bobtail" refer to in trucking?

The term "bobtail" refers to a truck operating without a trailer attached. In the trucking industry, this terminology is commonly used to describe the scenario when a tractor unit—typically a semi-truck—travels alone, without its cargo trailer. This situation can occur for various reasons, such as returning to the terminal after delivering a load or going to pick up a trailer from a different location.

Understanding the concept of bobtailing is important for several reasons, including considerations related to weight limits, maneuverability, and insurance coverage while the truck is operating in this manner. Bobtailing can also have different legal implications and operational challenges compared to when the truck is hauling a trailer.