What does the term "controlled track" refer to in locomotive operations?

The term "controlled track" refers to a track where movement is authorized and controlled by signals. This means that the operations on this track are tightly regulated to ensure safety and efficiency. Signal control is vital in maintaining safe distances between trains, managing train speeds, and ensuring that trains only move when it is safe to do so. By relying on signals, locomotive engineers can receive real-time information about track conditions, allowing for timely decisions that enhance operational integrity.

In contrast, the other options denote different types of track management or usage scenarios. For example, a track not under the control of a Rail Traffic Controller (RTC) implies a lack of oversight, which does not align with the definition of controlled track. Similarly, defined working limits relate to specific boundaries for train operations but do not inherently involve signaling. Lastly, a track designated for making up trains and storing cars mainly serves a logistical purpose and does not imply operational control through signaling. Thus, the specific aspect of signaling and authorization best characterizes controlled track.