Which signal governs trains entering and using a block?

Which signal governs trains entering and using a block?

• A. Signal, Fixed
• B. Signal, Hand
• C. Signal, Block
• D. Signal, Dwarf

Answer: (C)

In signaling, a block is a defined section of track between two signals. The signal that governs entering and using that block is the block signal. It tells the train whether the next block is clear so you may enter and proceed, or to stop if it isn’t. This is why it’s the one that directly controls entry into the block and occupancy of that block. Other signals serve different roles: fixed signals are just permanent locations for signals, hand signals are used by personnel rather than the system to authorize movement, and dwarf signals are a smaller type used in specific situations but do not uniquely define entry into a block.

In signaling, a block is a defined section of track between two signals. The signal that governs entering and using that block is the block signal. It tells the train whether the next block is clear so you may enter and proceed, or to stop if it isn’t. This is why it’s the one that directly controls entry into the block and occupancy of that block.

Other signals serve different roles: fixed signals are just permanent locations for signals, hand signals are used by personnel rather than the system to authorize movement, and dwarf signals are a smaller type used in specific situations but do not uniquely define entry into a block.