Which of the following governs movement when the cab signal conforms to the fixed signal upon entering the block?

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Multiple Choice

Which of the following governs movement when the cab signal conforms to the fixed signal upon entering the block?

Explanation:
The fixed signal governs movement at the block entrance. The cab signal is an in-cab indication that mirrors the fixed signal, but it does not override or extend the authority of the trackside signal. When the cab signal conforms to the fixed signal upon entering the block, you proceed exactly as the fixed signal permits—following its aspect and any associated speed restrictions. The cab signal simply confirms that both indications match; it does not grant additional authority. So, the controlling authority in this situation is the fixed signal.

The fixed signal governs movement at the block entrance. The cab signal is an in-cab indication that mirrors the fixed signal, but it does not override or extend the authority of the trackside signal. When the cab signal conforms to the fixed signal upon entering the block, you proceed exactly as the fixed signal permits—following its aspect and any associated speed restrictions. The cab signal simply confirms that both indications match; it does not grant additional authority.

So, the controlling authority in this situation is the fixed signal.

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