Interlocking Signals are:

Interlocking Signals are:

• A. The moving signals within a yard.
• B. A distant signal at a non-interlocking route.
• C. The fixed signals of an interlocking.
• D. A hand signal used by a flagman.

Answer: (C)

Interlocking signals are fixed signals that belong to an interlocking installation. An interlocking is the system that coordinates track switches and signals at a junction to prevent two trains from moving into conflicting routes. The signals in that system are fixed devices placed at specific locations and operated by the interlocking logic, showing the route status and whether it’s safe to proceed for that established route. They’re not moving yard signals, not distant signals on a non‑interlocking route, and not hand signals used by a flagman. The essential idea is that interlocking signals are the permanent indicators that control and protect movements within the interlocking.

Interlocking signals are fixed signals that belong to an interlocking installation. An interlocking is the system that coordinates track switches and signals at a junction to prevent two trains from moving into conflicting routes. The signals in that system are fixed devices placed at specific locations and operated by the interlocking logic, showing the route status and whether it’s safe to proceed for that established route. They’re not moving yard signals, not distant signals on a non‑interlocking route, and not hand signals used by a flagman. The essential idea is that interlocking signals are the permanent indicators that control and protect movements within the interlocking.