Which device is located in line-of-sight restricted areas and provides train occupancy information?

• A. Block Indicator
• B. Signal
• C. Beacon
• D. Interlocking

Answer: (A)

Block occupancy is shown by a block indicator,installed at the entrance to a block to reveal whether that block is occupied. In line-of-sight restricted areas, having a local indicator that the train crew can read directly is essential for safe operation, because it provides immediate awareness of the block’s status without needing distant or obscured signals. This device specifically communicates occupancy information to the train crew, which is why it’s the best fit here.

A signal serves to give movement authority (whether to proceed or stop) rather than the block’s occupancy status itself. A beacon offers general warnings or information but not the explicit occupancy state of a specific block. An interlocking coordinates signals and switches to prevent conflicting routes but does not provide occupancy information about the block.