Which term refers to the series of blocks between successive controlled signals in CTC territory?

The term "Controlled Block" specifically refers to the segments of track between successive controlled signals in Centralized Traffic Control (CTC) territory. In CTC operations, these controlled blocks are essential for managing train movements and ensuring safety. The signals within CTC territory are designed to communicate to train crews whether it is safe to proceed or if a stop is required.

By having defined controlled blocks, which are often linked to a centralized system that monitors the status of the signals, the dispatcher can effectively manage traffic flow, reduce delays, and prevent collisions. Each controlled block allows for precise control over the trains operating within that section, based on the signals displayed, providing a critical safety function in rail operations.

In contrast, other terms like "Absolute Block" refer to different signaling systems or contexts not specifically tied to the CTC framework. "Extra Train" and "EQUIPMENT" do not apply to the context of signaling and track management in the way that "Controlled Block" does, as they relate to different operational concepts in rail operations.