What fixed signal or hand signal at the entrance to a block governs trains using that block?

• A. Block Signal
• B. Distant Signal
• C. Home Signal
• D. Indication

Answer: (A)

In block signaling, the control that governs trains entering and using a specific block is the block signal. It sits at the entrance to the block and tells the train whether it may proceed into that block or must stop. A distant signal, which is placed ahead of the block signal, only provides advance warning of what the block signal’s aspect will be; it does not itself govern entry. A hand signal might be used to authorize movement if fixed signals aren’t functioning, but the normal controlling signal for entry is the block signal. Indication isn’t a separate governing signal. So the best answer is the block signal.