What does "switching" refer to in railroad terminology?

"Switching" in railroad terminology specifically refers to the process of moving train cars from one track to another. This action typically involves a system of tracks and switches (also known as points) that facilitate the movement of rolling stock to different destinations within a yard or between tracks.

The significance of switching lies in its role in organizing freight or passenger cars for various purposes, such as assembling trains for departure or sorting cars for delivery to different locations. This complex operation may require precise maneuvering and coordination to ensure that the trains operate efficiently and safely.

Understanding this definition highlights why the other options do not align with the term "switching." Connecting multiple trains together, while an important function in railroading, is more accurately described as coupling. Refueling operations pertain to maintenance but do not relate to the process of moving cars. Similarly, signaling procedures are about communication between train crews rather than the physical movement of rolling stock.