What type of block is established between controlled signals in Centralized Traffic Control (CTC) territory?

Answer: B — Controlled Block

In Centralized Traffic Control (CTC) territory, the type of block established between controlled signals is known as a Controlled Block. This system allows for the efficient management of train movements over sections of track, ensuring that trains can operate safely and without interference from other trains. In CTC, signals are controlled remotely by dispatchers who are responsible for maintaining safe distances between trains. A Controlled Block allows for the approval of train movements while ensuring that the block is only occupied by a single train at any given time. This adds a layer of safety, as trains can only enter blocks that are clear, preventing collisions and ensuring proper spacing. Understanding this concept is crucial for conductors as it helps to maintain operational safety and efficiency on rail lines, particularly in high-traffic areas managed under CTC. The other types of blocks mentioned, such as Absolute Block, refer to different systems or conditions that do not describe the specific arrangement used in CTC territory.