If only one signal indication is possible, this indication will?

If only one signal indication is possible, this indication will?

• A. Disregarded
• B. Govern
• C. Invalid
• D. Indicate something else

Answer: (B)

In railroad signaling, the indication shown on a signal is the controlling instruction for how a train may move in that block. If only one signal indication can be displayed, that single indication governs the movement—it's the permission or restriction you must follow for that segment until a different signal or instruction changes it. It isn’t disregarded or invalid, and it doesn’t indicate something else; it simply provides the authority you act on.

In railroad signaling, the indication shown on a signal is the controlling instruction for how a train may move in that block. If only one signal indication can be displayed, that single indication governs the movement—it's the permission or restriction you must follow for that segment until a different signal or instruction changes it. It isn’t disregarded or invalid, and it doesn’t indicate something else; it simply provides the authority you act on.